CT - 7567 / Legends CT - 7567 was a veteran clone trooper captain who led the Grand Army of the Republic ' s acclaimed 501st Legion during the Clone Wars . Bred and trained on the planet Kamino , CT - 7567 entered into Republic service at the Battle of Geonosis in 22 BBY . He gained respect from Jedi officers and clone troopers alike as an honorable commander , becoming known as one of the best and toughest clone troopers in the Grand Army . He was even selected for special command training under Advanced Recon Commando Alpha - 17 , following which he took the nickname " Rex . " As the captain of the 501st , Rex served as second - in - command to Jedi General Anakin Skywalker , whose bravery and unorthodoxy in battle he came to share . He was close friends with Marshal Commander Cody , with their relationship mirroring that of their respective Jedi Generals , Skywalker and Obi - Wan Kenobi . The four of them often received joint assignments to coordinate front - line campaigns against the Confederacy of Independent Systems . At the Battle of Christophsis , Rex became a mentor to Skywalker ' s newly assigned Padawan , Ahsoka Tano , with whom he forged a strong bond . He also managed to rebound from the following Battle of Teth , an engagement he would never forget due to the near - complete eradication of his 501st unit , Torrent Company . While on a listening post inspection tour with Cody , Rex rallied a small team of rookie soldiers to retake Rishi Station , which they thereafter destroyed to thwart Confederate General Grievous ' s planned invasion of Kamino . He was soon deployed on tour aboard Skywalker ' s flagship , the " Resolute " , and joined Skywalker and Tano in leading 501st offensives at Bothawui , JanFathal , and other flashpoints across the galaxy . He took part in countless campaigns in the galactic theater of war , from the containment of the Blue Shadow Virus on Naboo and the liberation of Ryloth to other hard - won victories like the Battle of Malastare , the Second Battle of Geonosis , and the Battle of Kamino . Throughout his career , Rex proved to be an effective leader who truly cared for the men under his command , even as he began to doubt his own future — and those of his clone brethren — in the Republic . The Battle of Saleucami of 21 BBY saw him meet the clone deserter Cut Lawquane , whom he came to respect despite their striking differences . His leadership was put to the ultimate test at the Battle of Umbara , when he was forced to unite the 501st Legion under an interim Jedi General , the obstinate and aggressive Pong Krell . Rex did not see eye - to - eye with Krell and found himself having to balance his troops ' well - being with Krell ' s high - casualty plans . When Krell manipulated the 501st into a fatal confrontation with their comrades from the 212th Attack Battalion , Rex realized their general was a traitor to the Republic , and he risked charges of treason to lead his men in arresting Krell . The ordeal refined his hard - line obedience to orders , as he also learned the value of making his own decisions as a soldier . Rex ' s unwavering dedication to the Republic kept him on the front lines over the three - year span of the Clone Wars . He aided Skywalker , Tano , and Kenobi in rescuing Togruta colonists from the Zygerrian Slave Empire and , in 20 BBY , offered his soldier ' s expertise to help the Jedi train local insurgents on Onderon to emancipate their world . In a stark turn of events , he and Skywalker apprehended Tano on Coruscant after she was framed for a bombing of the Jedi Temple , an incident that culminated in her departure from the Jedi Order . In addition , Rex and Skywalker gave pursuit of a longtime comrade , ARC trooper Fives , who had gone rogue after unearthing an anti - Jedi directive that had been bred into all of the Republic ' s clone troopers . Before Fives could prove his findings to Rex and Skywalker , the Coruscant Guard gunned him down for resisting arrest . By war ' s end in 19 BBY , Rex ceded his command over the 501st to another officer , Commander Appo , who oversaw the unit into the rise of the Galactic Empire . Biography . A number and a name . A Human male clone of the acclaimed bounty hunter Jango Fett , the clone trooper who received the designation CT - 7567 was born around the year 32 BBY on the planet Kamino for service in the Grand Army of the Republic . Granted advanced growth by the Kaminoan cloners , he was part of one of the first batches of clone troopers , and his early life largely incorporated Kaminoan flash training . As was the case with other clones who became officers , the Kaminoans spotted his natural leadership abilities early on , and over the next decade , he was put through additional command training and intensive programmed learning to develop his skills . By 22 BBY , he had begun training as a squad leader . That same year , CT - 7567 served on the planet Geonosis in the opening battle of what became known as the Clone Wars , fighting on the side of the Galactic Republic against the native Geonosians and the Droid Army of the Confederacy of Independent Systems . He survived the First Battle of Geonosis and continued his Grand Army service in the resultant intergalactic conflict , swearing to defend all Republic citizens from harm as part of his oath of loyalty to the Republic state . He served with Jedi Generals on multiple occasions and learned to respect their abilities ; in turn , Jedi officers came to rely on him . Thanks to his aggression on the battlefield , he earned a reputation as one of the Republic Military ' s best and toughest clone troopers . Such was his prowess and performance that he was withdrawn from his unit and was among the 100 clone officers recalled to Kamino to undergo specialized command training . Under the hardened eye of Advanced Recon Commando Alpha - 17 , CT - 7567 and his fellow soldiers endured grueling exercises to develop independent thought , improvisation , and individuality . The ARC program led CT - 7567 to befriend another officer , Marshal Commander CC - 2224 . After Alpha - 17 rewarded their individualism by granting them proper names , CT - 7567 and CC - 2224 became known as " Rex " and " Cody , " respectively , with the former keeping the origins of his nickname to himself . Rex often found himself working with Cody , particularly in a number of dangerous campaigns . One example was the Battle of Tibrin , in which they tried and failed alongside several Jedi to oust a Separatist military presence from Tibrin . Though the battle was a crushing Republic defeat , Rex and Cody managed to survive . Within several weeks of the First Battle of Geonosis , Rex , having become well respected by clones and Jedi officers alike , was given the rank of clone trooper captain . In addition , the Mandalorian veterans who trained clone officers on Kamino bestowed on him the battle honor of Mandalorian " Jaig " eyes , and he had the adornments emblazoned on his clone trooper armor ' s helmet . In the same year , a new elite unit was formed within the Grand Army : the 501st Legion , whose members ' training surpassed even that of the lethal Advanced Recon Commandos . Rex was given command of the core group of the 501st Legion , with which he was tasked with patrolling the galaxy ' s lawless Outer Rim Territories . As part of his designated 501st detachment , Rex received his own troop detail — Torrent Company , which became based out of the GAR clone barracks on the Republic capital world of Coruscant . He and his men were placed under the overall command of Jedi General Anakin Skywalker , who accepted his officer ' s commission after being appointed as a Jedi Knight four weeks into the war . As Skywalker ' s second - in - command , Rex learned much from his commanding officer , developing a certain friendship with him . He operated with Skywalker on the front lines , with the two frequently turning unconventional tactics into Republic victories . As Skywalker later recalled , Rex , as a rookie trooper , was initially eager to follow every order to the letter but became less wound tight with the passage of time . The 501st Legion garnered fame and veteran status under their leadership , and Supreme Chancellor Palpatine took notice of how Rex and his men adopted Skywalker ' s unorthodox strategies with repeated success . Under Palpatine ' s direction , the 501st grew into an amalgamation of clone units whose members underwent secret training and were moved across the galaxy ' s battlefields as the war effort required . Besides his friendship with Cody , Rex formed a working relationship with Denal , a fellow 501st member , and befriended Advanced Recon Force Sergeant CS - 2207 , nicknamed " Boomer . " He also became acquainted with Cody ' s own Jedi General , Obi - Wan Kenobi . On one assignment , Rex and his battalion teamed up with a squad of elite Advanced Recon Commandos to attack a battle droid army that had captured a strategic city . Captain of the 501st . Battle of Christophsis . Seven weeks into the war , Rex and Cody were dispatched with a Republic battle group under the command of Skywalker and Kenobi to liberate the planet Christophsis , which had fallen to the Confederacy and its Retail Caucus conglomerate . En route to Christophsis aboard a " Venator " - class Star Destroyer , Rex witnessed a holographic broadcast alongside Skywalker , Kenobi , and Cody in which General Whorm Loathsom , the leader of the enemy invasion , pressured the Christophsian populace into submitting to Separatist rule . After reaching the Christoph system , the Republic forces defeated Confederate Admiral Trench ' s naval blockade and established a base on the surface . Skywalker and Kenobi then took a clone contingent led by Rex and Cody into the capital , Chaleydonia , more commonly known as Crystal City . Once there the Jedi and clones prepared an ambush to offset the Confederacy ' s advantage in troop strength . They moved into a business complex with two north - and south - facing towers , from where they intended to intercept a Separatist droid battalion set to pass through the major plaza below . Rex and Skywalker stationed their men in the north tower ' s forty - sixth level , while that of the south tower housed the detail led by Kenobi , Cody , and Clone Sergeant Slick . As the Separatist battalion commanded by the T - series tactical droid TJ - 55 marched through the business complex ' s plaza , the troop column unexpectedly split in half . The Republic ' s strategy was thus compromised when numerous B1 battle droid squads ambushed Kenobi ' s men in the south tower . After signaling clone trooper pilot Hawk for an evacuation , Skywalker , Rex , and their men used their DC - 15A blaster rifle s ' ascension cables to rappel over to the south tower . They avoided laser fire from the droid infantry below and arrived to reinforce Kenobi and Cody , who were holding out against overwhelming numbers . Once Kenobi temporarily impeded the droids ' advance by Force - pushing a blaster cannon at them , the combined clone detachment took a turbolift to the roof for their evacuation . TJ - 55 pursued them to the roof with more droid troops , and Rex , Cody , and the clones provided cover fire for Skywalker and Kenobi to cut through the droids . Hawk ' s LAAT / i gunship soon arrived , and Rex and his comrades escaped with TJ - 55 ' s cranial unit , which trooper Gus had pilfered . Back at the base that night , Rex and Cody analyzed TJ - 55 ' s cranial unit in the command center under a robolobotomy , but they only confirmed that the Confederacy had been aware of their plan before the unit stopped processing . Upon being apprised of their clone officers ' findings , Skywalker suggested that a security breach was the cause for the Separatists ' acquisition of their strategy , but Kenobi went so far as to suspect that there was a spy among their men . Skywalker and Kenobi decided to investigate behind enemy lines , ordering Rex and Cody to keep their mission confidential and remain behind to apprehend the potential traitor . Shortly after the Jedi departed , Cody was alarmed to find a Hush - 98 comlink deliberately left activated on a nearby table with the troops ' other equipment , indicating that someone had remotely eavesdropped on their entire conversation with the Jedi . Rex then noticed a figure in the hallway too far away to be identified : Sergeant Slick , who had become a spy for the Dark Acolyte Asajj Ventress and the Confederacy out of a grudge against the Jedi . Slick immediately broke into a run and ignored Rex ' s commands to halt , forcing Rex and Cody to pursue him through the base . Despite losing their target , the two officers were able to follow his path through the complex ' s hallways to the clones ' mess hall , where they realized that the traitor was one of their own brethren . Returning to the command center , Rex and Cody attempted to contact Skywalker and Kenobi but found that communications were being blocked , potentially by the spy in their camp . Rex resolved to use Skywalker ' s astromech droid , R2 - D2 , to check the station ' s outgoing transmission logs from the past few days . Musing through R2 - D2 ' s findings with a datapad , Rex traced an odd spike in wavelength interference to a computer terminal located in the barracks of Slick ' s platoon . Inferring that one of Slick ' s men was the spy , Rex and Cody decided to individually interrogate the platoon ' s members despite protest from Slick . Though troopers Jester , Punch , Sketch , and Gus all passed interrogation with credible alibis , trooper Chopper was forced to reveal that he had broken war protocols by stealing battle droid fingers from the battlefield and stringing them into a necklace . While attempting to derail Chopper ' s trustworthiness , Slick inadvertently revealed his knowledge of the Jedi ' s mission — information he could have only obtained via the open comlink that Cody had found in the command center . When put on the spot , Slick attacked Cody and Chopper and promptly fled from the barracks , leaving his platoon charges , as well as Rex and Cody , shocked with the revelation of the sergeant ' s true allegiances . Rex and Cody immediately gave chase to the exposed Slick , tracing a signal from his utility belt to the gunship landing platform . Instead of Slick , they found his utility belt attached to a primed thermal detonator , and they scrambled for cover just before the explosive triggered a series of others . The resulting explosion decimated the landing platform and the weapons supply depot , as well as the base ' s power generators . Upon learning from Gus and Chopper that Slick had been spotted running into the command center , Rex headed with Cody to apprehend the saboteur , leaving Slick ' s platoon and the other troops to seal the perimeter . In the command center , Rex and Cody noticed that Slick was hiding in the above ventilation shaft and engaged in a ploy to bait him out of his hiding place . While Cody secretly removed the ammunition from his DC - 15S and left the weapon on the holotable console , Rex appeared to leave for the south exit to restart the base ' s power generators . Once the blast doors had closed behind him , he reentered the room and assisted Cody in confronting Slick , who had forsook his cover to steal Cody ' s empty blaster . Although held at blasterpoint , Slick refused to surrender , grabbing Rex ' s DC - 15S and bowling him over . In the ensuing brawl , Cody and Slick disarmed each other and engaged in unarmed combat . When Rex joined in , he received a blow to the head , and Slick knocked him to the floor and used the " groin popper " maneuver to dislocate his leg . Nevertheless , Cody swiftly knocked out Slick , and the enemy agent was detained and locked in handcuffs . When Skywalker and Kenobi returned , Rex and Cody presented them with Slick , who , no longer comatose , attempted to justify his actions with his hatred for the Jedi . Slick ' s accusations elicited rebuttals from his clone officers , who countered that his exploits had endangered the lives of the clone brothers he claimed to love . Once Slick had been ushered away to lockup , Rex and Cody reported the sabotage of the weapons depot to Skywalker and Kenobi , who replied that they had discovered the full strength of the on - world Separatist invasion force , numbering close to a thousand units . Whorm Loathsom soon launched his first assault on the Republic forces , which became based out of Crystal City . After several days of battle , the Jedi and clones were able to beat back the Separatists , forcing them into retreat for the time being . Rex took advantage of the lapse in fighting to shave his hair and review casualty reports on his datapad near the Republic ' s temporary forward aid station . He conferred and joked there with the medic on duty , Clone Sergeant Coric , as well as trooper Ged , who was being treated for a shoulder injury . The moment the Confederate forces initiated another attack , Rex grabbed his rifle and joined Skywalker and Kenobi in the streets . While Cody assisted Kenobi in marshaling a defense of their base , Rex took a clone platoon to accompany Skywalker along a route parallel to the city ' s main street . As the clones made their way behind enemy lines , Rex recalled how the antebellum Crystal City had been glittering with beauty just days prior until the fighting crippled the city . He followed Skywalker and the rest of their men , including Coric and a patched - up Ged , to an energy sphere tower , where they divided their troops . While most of the platoon was tasked with targeting the street - level droids , Rex and Skywalker took several troopers to the roof to surprise a trio of advancing octuptarra magna tri - droid s from above . Rex and his men used JT - 12 jetpacks to reach the street below , while Skywalker landed on one of the tri - droids himself . Rex and his comrades ' combined efforts brought down the three droids , and they turned their attention to the droid infantry ' s exposed rear flank , pressing on without haste . Once Loathsom and his droid army had been driven into another retreat , a Republic " Nu " - class attack shuttle landed in Crystal City ' s Central Plaza . Although Kenobi believed that his new Padawan learner was on board , he and Skywalker found that instead of delivering some expected reinforcements , the shuttle had brought the young Padawan Ahsoka Tano , who had been apprenticed not to Kenobi , but to Skywalker . Rex was introduced to Tano at the base ' s observation post and was surprised to meet the new Padawan , as Skywalker had previously sworn never to take a Padawan . Rex could not help but chuckle when Tano nicknamed her new Master " Skyguy , " but Skywalker , annoyed with her hubris and arrogant behavior , told his captain to give her an " acquaint of the position " while taking her on his inspection rounds of Central Plaza ' s lookout points . Rex complied and ushered Tano away to confer with her privately . Harnessing various elements of his training , Rex helped Tano to better understand her role as a commander in the Grand Army , and they were able to reach an understanding of each other — although Tano was still eager to prove she was ready to be Skywalker ' s apprentice , she learned to be more appropriate and respectful to her superiors . While near the Republic ' s setup of AV - 7 Antivehicle Cannon s , Tano noticed that the Confederacy was deploying a deflector shield , a development that alarmed Rex , who knew that such a shield would render the Republic ' s artillery useless . Both of them joined Skywalker and Kenobi at the comm station to devise a tactic to repel the imminent Separatist counterattack . The group decided that Skywalker would take his Padawan behind enemy lines to eliminate the shield generator , while Rex and Kenobi would engage the droids to stall for time . After Skywalker and Tano departed , Rex and Kenobi attempted to use the heavy cannons against the enemy ' s expanding shield but only confirmed that they were indeed useless . Using an unencrypted comlink channel to appear more convincing to the Separatists , Rex ordered the clone forces to fall back before switching back to a secure channel . Via eavesdropping on Confederate voice traffic , he learned that Loathsom had ordered his infantry to target the heavy cannons , which had impeded his troops earlier in the battle but were now ineffectual and vulnerable . As soon as the deflector shield passed over them , Kenobi led a forward charge on Loathsom ' s front lines , while Rex and his men lured the droids into the buildings along the main street . When the droids fired a missile at the comm post that Rex was using as cover , the explosion winded him and knocked him to the ground . After being forced to pull back his men , he met with Kenobi at the command center . Although Rex proposed that they use the heavy cannons in spite of the shield , which would cause fatal overpressure and result in severe collateral damage , Kenobi instead ordered him to mobilize a defense of the cannons while the Jedi Master himself delayed the droids . Despite his reluctance to leave Kenobi to fend for himself , Rex obeyed orders and retreated while Kenobi confronted the oncoming droids . As the shield approached the heavy cannons , Rex , Coric , and their men countered the advancing droids ' fire from some rubble near the main street . Rex soon learned that Kenobi had surrendered to Loathsom , but he deduced that the Jedi General was simply stalling and rallied his men to hold the line . As Rex and his men withstood the onslaught from the droids ' overwhelming numbers , Skywalker and Tano eliminated the shield generator . Rex was aiming at a Kerkoiden tank commander when he caught a glimpse of the receding shield , and he killed the enemy officer out of sheer relief at the sight . He quickly ordered the heavy cannons to commence firing on the exposed Separatists and their Armored Assault Tanks , to great effect . With Republic Admiral Wullf Yularen and Jedi Grand Master Yoda arriving with reinforcements to complete the process of securing Christophsis , Rex allowed himself to breathe and personally feel the deaths of his men , acknowledging the pain that came with losing them . Although LAAT / i gunships flew in and began to bombard the nearby droid lines , he braved the incoming fire to help Coric search through the debris for two surviving troopers whom they had located via their helmets ' heads - up displays . Rex later took a gunship to pick up Skywalker and Tano from the shield generator site , then returned with them to the command base in Crystal City . During the flight back , he congratulated Skywalker and Tano on their successful mission — making a point to commend the young Tano , who was slowly earning his respect . Battle of Teth . Following the victory on Christophsis , Skywalker and Tano were assigned to rescue Rotta , the son of the Hutt crime lord Jabba Desilijic Tiure , from enemy kidnappers . Their orders came as part of the Republic ' s overall effort to convince Jabba to grant the Grand Army access to hyperspace lanes running through Hutt - controlled space . Rex and Torrent Company accompanied the two Jedi to the planet Teth — where Republic Advanced Recon Force trooper scouts had tracked the Huttlet — in an " Acclamator " - class transport . Because the clifftop monastery where Rotta was being held was a half - mile off the ground and was being guarded by a detachment of battle droids , Skywalker elected to launch a vertical assault up the cliff face to reach the monastery . LAAT / i gunships ferried Torrent Company to the surface , and LAAT carriers brought a pair of AT - TE walkers along as extra support . When the monastery ' s droid defenders opened fire on the approaching craft , Clone Lieutenant Hawk — the pilot of the gunship carrying Skywalker , Tano , Rex , and their men — closed the gunship ' s blast shields to deflect the incoming fire . The gunships landed in the forest below the cliff , and the AT - TEs returned fire at the droids , providing cover for the Jedi and clones to take refuge in an overhang . Rex soon sighted an object falling from the cliff , and what he initially believed was an explosive device turned out to be a fallen battle droid . Following Skywalker and Tano ' s lead , the men of Torrent Company employed their blasters ' ascension cables to scale the cliff , with Rex using his rappel line to ascend it . As a vertical crossfire commenced , the droid cannonades felled one of the AT - TE walkers , severing its grip on the cliff . Rex watched in horror as the AT - TE plummeted to the ground , taking all of the troops beneath along with it . When B1 battle droids on Single Trooper Aerial Platforms flew in to attack the clones in mid - climb , Rex trained his blasterfire at the airborne droids before Skywalker eliminated them . Torrent Company reached the monastery and destroyed the remainder of the droid infantry , albeit at the loss of half of its men . Upon arrival at the summit , Rex called in a gunship to casevac their fifteen wounded troopers , assigning several men to look after them in the meantime . He and Skywalker deduced from the heavy droid presence that the Separatists were the Huttlet ' s captors . Leaving most of the men outside in the event of another assault , Rex took Sergeant Coric and troopers Lunn , Vaize , and Ayar to help Skywalker and Tano scour the monastery for the missing Huttlet . Entering the dimly lit castle , Rex and his men activated their helmet ' s headlights for better vision . Inside , the protocol droid 4A - 7 , claiming to be the monastery ' s caretaker , greeted and thanked them for liberating him from the battle droids . Learning from the protocol droid that the Separatists had kept their prisoners on the detention level , Skywalker and Tano proceeded there to rescue the Huttlet while Rex and his men stayed behind to guard the entrance . Though unable to confirm his suspicions , Rex correctly suspected that 4A - 7 was not what he appeared to be — the droid was aiding the Dark Acolyte Asajj Ventress as part of a Separatist plot to frame the Republic and the Jedi Order for Rotta ' s kidnapping . Rex returned to the monastery courtyard and finished securing the castle with his troops . As midday approached , he learned from Skywalker that Rotta had been found and sent Coric to help transport the Huttlet with a backpack . Upon their return , Skywalker and Tano prepared to leave Teth with Rotta aboard a gunship that Rex had on standby for them . However , Tano ' s discovery that the Huttlet was ill halted their preparations for an evacuation and forced them to consider another solution . While Skywalker and Tano were delivering a status report to Kenobi through R2 - D2 ' s holoprojector link , a pair of Confederate C - 9979 landing craft approached the monastery and deployed Vulture droid starfighters and ground troops . With battle droids invading the courtyard , Rex and Skywalker mobilized Torrent Company to defend their position while Tano returned inside with Rotta . After briefly conferring with Skywalker on the weak chances of getting Tano and Rotta safely off - planet , Rex dispatched Sergeants Coric and Hez and their squads to provide covering fire for the rest of the company . Their remaining AT - TE walker was shot down , and Torrent Company began to take heavy losses . Rex joined his men in retreating into the monastery , and with everyone else inside , Skywalker ordered his captain to shut the entrance door . He initially refused , as Skywalker would be locked outside with the droids , but when his general tersely repeated the order , he complied and fired a blaster round at the controls . Skywalker used the Force to propel himself through the closing gap and into the entrance chamber , sealing all of them inside . With three - quarters of their men dead , several wounded , and only three medic - trained troopers remaining , Tano convinced her Master that it was best to find medical attention for the sick Rotta . Skywalker and his Padawan left with R2 - D2 to escape from the castle while Rex remained with Torrent Company to hold their position . Rex and his men braced themselves as the Separatist battalion — under the command of Asajj Ventress — disabled the door ' s lock mechanism , allowing B1 , B2 , and DSD1 dwarf spider droids to flood into the stronghold in overwhelming numbers . Rex watched as his men fell to enemy fire one by one before being knocked to the ground himself . Feigning death , he secretly contacted his surviving comrades through their private comm frequency and learned that only five of his men , including Coric , remained . As Ventress entered the antechamber and gave orders to an OOM command battle droid , Rex destroyed the droid with one of his DC - 17 hand blasters and then targeted the Dark Acolyte . However , Ventress immediately drew her double - bladed lightsabers and deflected his laser shots . She telekinetically disarmed him of his blaster pistol and Force - choked him , demanding that he reveal Skywalker ' s whereabouts . Having been trained in mental resistance , Rex kept repeating his name , rank , trooper designation , and battle group to avoid succumbing to her influence . She finally gave up her interrogation and , after dropping the defiant Rex to the floor , performed a mind trick , ordering him to contact Skywalker and ask for his general ' s location . Rex resisted Ventress ' s influence and commed Skywalker of his own accord , using a false voice and addressing him as " Anakin " instead of his usual " General Skywalker " to allude to Ventress ' s presence . Unaware of his exploit , Ventress threw him aside and departed to personally confront Skywalker , tasking her battle droids with guarding the survivors of Torrent Company . Though he suspected that his rib s had been broken , Rex mimicked unconsciousness to avoid attracting the droids ' attention . He repeatedly checked in with his men over their private frequency , keeping them prepared to mount a last stand . Skywalker soon made contact via comlink , and because Rex had forgotten to divert the signal to his helmet , the battle droids overheard the device . As the enemy units converged on him , he destroyed several of the droids closest to him and stole an E - 5 blaster rifle from one of them . Moving as one , the other 501st survivors — Coric , Nax , Zeer , Del , and Attie — sprang to their feet and also attacked their captors , pilfering blasters for themselves . Using the fallen AT - TE as cover , they engaged the droids in a crossfire . Rex took a painkiller from his utility belt medpac before reporting their situation to Skywalker . Eventually , Zeer planted explosives in an eviscerated super battle droid and detonated the unit once it had been sent back into the Confederate lines . The trap droid destroyed many of its comrades , but only a few minutes elapsed before the droids regrouped to resume their attack . Rex and his comrades were able to bring down an advancing Vulture droid starfighter , using it as cover to combat the droids at a closer proximity . Nevertheless , the clone troopers were seriously outnumbered , and the battle droids demanded their surrender . At that moment , Obi - Wan Kenobi arrived at Teth with Commander Cody , the 212th Attack Battalion , and an armada under the command of Wullf Yularen . Leading an aerial assault on the droids , Kenobi jumped out of his Delta - 7B starfighter to assist Rex and the other Torrent Company survivors while LAAT / i gunships deployed Cody and his men . Learning from Rex that Skywalker was most likely still in the stronghold , Kenobi left to find his fellow Jedi General . Eventually , Skywalker — having found and commandeered the " Twilight " , an old spice freighter , with Tano and Rotta — contacted Rex , reluctantly telling him that they would be unable to give support since returning Rotta to his father on Tatooine was still their priority . Rex understood his general ' s dilemma and replied that he and his men would be able to hold out thanks to Kenobi ' s aid . Under covering fire from his men , Rex charged at an advancing dwarf spider droid and planted a primed thermal detonator on it , jumping away in time to avoid the explosion that engulfed it . As Rex and his men cut through the battle droids , Kenobi returned from a duel with Ventress . Rex voiced his doubt that Skywalker and Tano would be able to reach Tatooine in their dilapidated freighter , but Kenobi was confident that Skywalker ' s expertise at a starship ' s controls would prove adequate . After the Republic finally emerged victorious on Teth , Rex conferred with Cody amidst the settling dust , venting his frustration with the poorly handled operation . Although Rex was still devastated with the loss of Torrent Company , his friend stated that their efforts had not been in vain , as Skywalker and Tano had reached Tatooine with Rotta . The two clone officers accompanied Masters Yoda and Kenobi to Jabba ' s Palace on Tatooine to retrieve Skywalker and Tano , who had returned Rotta to his father and established a treaty with the Hutts for Grand Army access through Hutt Space . Upon meeting with Rex , Skywalker and Tano wanted to hear all the details of the battle ' s end , of the men who had won and paid the ultimate price for the victory . Despite his distress , Rex agreed to recount it to them . Though Torrent Company was replenished with new troops , the defeat of the original unit stayed with Rex for a long time . Shipyards of Gwori . As warfare continued to devastate the galaxy , the Confederate Navy , outnumbering the Republic Navy fourfold , put the Republic ' s war effort at a supreme disadvantage . With the likelihood of being prematurely defeated in the war , the Jedi High Council decided to impair Separatist starship production by targeting the InterGalactic Banking Clan ' s Confederate - allied Gwori shipyards . Because the shipyards ' exact location on Gwori ' s planetary surface had yet to be determined , the task of pinpointing it fell to Rex , Skywalker , and Kenobi . To penetrate Gwori ' s defenses — namely , a droid - operated blockade and a radiation beam that eradicated all life forms bound for the planet — Skywalker chalked out a plan for a small strike force to be temporarily frozen in carbonite . R2 - D2 , whose presence would not cause much suspicion to the blockade ' s droid security , would then pilot the team to Gwori . After locating the shipyards , they would relay the coordinates to Generals Plo Koon and Saesee Tiin , who would eliminate the facility with a Republic squadron . Initiating preparations on Coruscant , Rex gathered a clone squad at carbonite freezing plant CT - 642 , where Skywalker assured his captain that they would not be frozen long enough for hibernation sickness to take effect . Rex and his men , along with Skywalker and Kenobi , were encased in carbonite with the addition of Tano , who had been ordered not to participate in the mission but nonetheless manipulated Admiral Yularen to grant her clearance . Rex and the strike team proceeded to Gwori aboard the freighter VX - 391 , with R2 - D2 at the controls . When the blockade ' s battle droids discovered that the ship was unregistered , R2 - D2 was forced to release the task force and jettison from the vessel just before the battle droids shot down the freighter . The astromech droid freed Tano from her carbonite slab , and she in turn released Rex and the others . Once they had found the enemy facility , Skywalker and Kenobi sent Rex , Tano , R2 - D2 , and two other clone troopers to contact Koon and Tiin from a nearby communication tower . After the group broke into the station , Tano transmitted the shipyards ' coordinates to Koon , Tiin , and Yularen , who were waiting in the Moskk system . Before Rex and his comrades could arrange to be evacuated from Gwori , the transmission was cut off when the shipyards ' supervisor , Overseer Juhm , contacted the station and discovered the presence of the Republic strike team . Rex , Tano , and their men managed to flee with R2 - D2 just before Juhm remotely destroyed the station , and Tano relayed the developments to Skywalker and Kenobi . While their superiors infiltrated the shipyards , Rex , Tano , and their team went to find cover on Gwori ' s plains , where a squad of jetpack - equipped B2 - RP battle droids attacked them . After escaping from the droids , Rex and his comrades took refuge in a cave that they soon found was the current residence of a large lizard - like creature , which killed one of the clones before Tano could eliminate it . As time passed , the extended lack of communication from Skywalker and Kenobi led Tano to conclude that their commanders were in trouble . She decided that it was time to " alter " Skywalker ' s orders of staying concealed , and though Rex voiced some doubt , he left the cave with Tano and the other trooper . However , Juhm was waiting for them just outside with a squad of B2 super battle droids and killed their clone companion on sight . Presented with the choice of capitulating or being immediately gunned down , Rex and Tano decided to comply with Juhm ' s demands and were taken away , leaving R2 - D2 back in the cave . As night fell , Juhm had Rex and Tano attached to electrically charged frames alongside Skywalker and Kenobi , who had been captured at the shipyards . Before departing , Juhm left a trio of IG - 100 MagnaGuards to guard them from a horde of local spiders , his intent being to let them survive as a reminder to the shipyards ' slaves of his absolute superiority . Although the four were tortured and electrocuted in turn , Rex grudgingly expressed his gratitude for the MagnaGuards ' protection from the spiders . In an attempt to free themselves , Skywalker , Tano , and Kenobi used the Force to destroy the MagnaGuards , and R2 - D2 arrived and cut them and Rex from their frames before the spiders could attack . The team proceeded to the shipyards and convinced Juhm ' s slaves , who numbered over a thousand , to emancipate themselves from their servitude . At dawn the next day , Rex , Skywalker , Tano , and Kenobi stole one of the shipyards ' near - completed " Munificent " - class star frigates and escaped aboard it with the ex - slaves , just as Koon and Tiin arrived with their team of bombers . Koon and Tiin led the BTL - B Y - wing starfighter s of Hunter Squadron on their strike on the Banking Clan facility , dropping their munitions on the site . Skywalker , meanwhile , used their frigate ' s tractor beam to retrieve trooper Toomer , who had been left behind at the drop zone when his carbonite slab ' s controls malfunctioned , and headed for the Separatist blockade . However , the battle droids overseeing the blockade detected the multitude of life forms aboard the stolen frigate , and at Juhm ' s behest , they activated the radiation beam . Before the beam could vaporize Rex and the other passengers , Koon and Tiin intervened , disabling the scan gate that was projecting the beam . The two Jedi Masters hitched a ride on the vessel , as their hyperdrive booster rings had been destroyed , and they left the Gwori system for Coruscant , where Juhm ' s ex - slaves found employment with the Republic . Once Toomer had been freed from his carbonite , Rex reassured the disappointed trooper that there would be more fighting to come . Outpost inspections . Rex was stationed with Skywalker , Tano , and Admiral Yularen aboard Skywalker ' s flagship , the " Venator " - class Star Destroyer " Resolute " , when it was deployed to the Bith system during the emerging threat of a new Separatist superweapon . After the enemy weapon executed a devastating assault on Plo Koon ' s forces in the nearby Abregado system , the " Resolute " was reassigned to protect the Republic ' s supply convoys alongside Kenobi ; his flagship , the " Negotiator " ; and the rest of their fleet . Skywalker thereafter divided his armada to increase their defensive perimeter and departed with Tano to scout ahead for enemy activity . Rex was present on the " Resolute " bridge with Yularen when Kenobi contacted them to check on their progress as well as Skywalker ' s whereabouts . Yularen reported that the convoys were on schedule and also informed Kenobi of Skywalker ' s orders . Skywalker and Tano soon discovered that the Separatist superweapon was the " Malevolence " , a powerful " Subjugator " - class heavy cruiser that was equipped with an ion pulse cannon . The " Resolute " was again reassigned , this time to join a Republic naval strike on the " Malevolence " near the Kaliida Nebula . The ensuing Battle of the Kaliida Nebula saw the battleship eradicated , its threat to the Republic ended . Rex and Commander Cody were next assigned to inspect several small but integral Republic bases and listening posts . Their first inspection site was a tracking station in the Pastil system . Upon arrival on Pastil aboard Rex ' s " Nu " - class attack shuttle , the " Obex " , Rex began assessing the outpost with Cody and commented on the station ' s extreme cleanliness . Trooper Stripe informed them that an MSE - series droid nicknamed " Rodent " maintained the base , mentioning that the droid had a glitch and spent hours cleaning the outpost . Recognizing the droid ' s characteristics as those of a spy droid , Rex called out a Code Aurek alert and ordered the facility ' s troopers to track down Rodent . The rookie clones were unaware of Rex ' s suspicions and initially thought he was crazy , but when Rex found the droid and blasted its body , the droid ' s wheel s activated of their own accord and fled , a feature uncommon in regular MSE droids . The troopers eliminated three of the wheels , and when the fourth made for a grate , Stripe destroyed it with a thermal detonator ; the resulting explosion caused a significant amount of damage to the hallway . Amused with Stripe ' s solution , Rex told the troops to clean up the mess before leaving the station with Cody . After Cody reported their successful inspection to Skywalker and Kenobi , who were aboard the " Resolute " , he and Rex proceeded to Rishi Station , an outpost in the Outer Rim ' s Rishi system . They were unaware that Confederate BX - series droid commandos had just overrun the base . When Cody contacted Rishi Station for landing authorization , a droid commando posing as a clone trooper answered the transmission . Hearing the trooper ' s droid - like responses , Rex sensed that something was amiss but continued with Cody to the moon where the outpost was located , with Cody placing him in charge of the inspection . Upon landing at the station , Rex noted the absence of an on - duty deck officer , remarking that such an error was sloppy . A droid commando disguised in clone armor came out to greet Rex and Cody . When Rex caught sight of a droid attack flare launched from close by , he promptly shot the " trooper " who had greeted them in the head . At first Cody was shocked with his brazen behavior , but Rex removed his victim ' s helmet to unmask the disabled droid . More droid commandos appeared and ambushed Rex and Cody , who exchanged fire with them while using some of the surrounding crates as cover . The droids tossed a series of thermal detonators at the " Obex " , forcing the two officers to jump off the landing platform . They fired their blaster cables at the underside of the platform and rappelled to the ground below ; the droids , meanwhile , presumed that the explosion had claimed their lives . With the " Obex " destroyed , Rex and Cody mused over being stranded on the Rishi moon , recalling their similar situation on Tibrin . They came across the three survivors of the droid assault — CT - 782 , CT - 27 - 5555 , and CT - 21 - 0408 , nicknamed " Hevy , " " Fives , " and " Echo , " respectively , who had also launched the warning flare — and Rex ordered them to take off their helmets to verify that they were clones . After the three did so , a predatory Rishi eel emerged from a nearby crevice ; Rex impressed the three rookie troopers by expertly killing the eel with a single blaster shot to its eye . Once they introduced themselves , Rex and Cody learned from Echo that their sergeant had died in the initial attack . Dubbing Echo , Hevy , and Fives " shinies , " a derogatory term for their as - yet - unspoiled armor , Rex placed a handprint of blood from the eel ' s carcass on Echo ' s armor to commemorate his valor . When Hevy expressed the rookies ' shared desire to recover their outpost regardless of their inexperience , Rex stated that there was hope for them yet . The five troopers climbed up the canyon wall to Rishi Station , with Rex and Cody offering the carbines of their DC - 15S blasters to the rookie troopers . Rex devised a plan to gain access to the enemy - held base , posing as Commando Unit 26 in clone armor and mechanically walking toward the blast doors ' surveillance systems . He conferred with Droid Units 07 , 08 , and 09 , who were guarding the entrance from inside . He maintained his cover by pretending to adjust his " vocabulator " and using an inert droid head as visual verification of his identity . Although Cody doubted the tactic would work , the droids admitted Rex entry , and he and the others gunned down the guards with celerity . Taking point despite Hevy ' s request for the lead position , Rex led the assault on the droids in the command center . He gunned down several of the droid commandos manning the central computer before the droid commando captain targeted him from atop a perch on a higher level . Rex blasted the droid ' s blaster out of his hand , which only caused his opponent to draw a vibroblade , but he quickly snapped the droid ' s neck with his gloved hands . Though Rex and the others triumphed over the droid commandos , their victory was short - lived . The group of five discovered that a Separatist fleet — led by General Grievous — was passing over the moon , and they deduced that the droids had hot - wired the station ' s all - clear signal to prevent the Republic from learning of the impending invasion . To investigate the lack of response from the droid commandos , Grievous dispatched a C - 9979 troopship , which landed at the base and deployed droid infantry reinforcements . As Cody noted their slim chances of success , Rex decided that they had to destroy Rishi Station : Despite the plan ' s lack of convention , the subsequent cessation of the all - clear signal would alert the Republic to the invasion . Echo contributed to Rex ' s plan , offering that they could repurpose the station ' s supply of liquid Tibanna gas as explosives to raze the facility . Before setting the operation into motion , Rex and Cody spoke with Echo , Fives , and Hevy to prepare them for the forthcoming battle . Rex stated that the Confederacy ' s main target could only be Kamino and cited its personal importance to the clones , rallying the rookie troopers with the knowledge that they were fighting for all of their brethren back home on Kamino . While Cody , Hevy , and Fives confronted the battle droids at the entrance , Rex and Echo ushered several PLNK - series power droids , or " plunk droids , " containing the liquid Tibanna into the command center . As they wired the three plunk droids together , Rex encountered problems with the detonator ' s remote handset . Hevy offered to stay and repair the remote , allowing Rex , Cody , Echo , and Fives to escape outside via a maintenance pipe . Rex assumed that Hevy had summarily fixed the remote and was right behind them , but when he told Hevy to detonate the explosives , he discovered that the trooper had not yet joined them . He contacted Hevy and ordered him to vacate the base , but Hevy stated that he would have to manually activate the charges due to the remote ' s defectiveness , ignoring Rex ' s protests . Although Rex and the others backtracked to help their comrade , Hevy sacrificed himself to destroy the base and warn the Republic of the Separatist invasion . The termination of the all - clear signal elicited an immediate reaction from the Republic fleet , which arrived and drove Grievous ' s invasion force out of the system . LAAT / i gunships collected Rex , Cody , Fives , and Echo from the moon and brought them aboard the " Resolute " . In the Star Destroyer ' s hangar , Skywalker and Kenobi commended Echo and Fives for their valor , awarding them medals , and also honored Hevy ' s sacrifice . Rex , impressed by the efforts of the former " shinies , " inducted Fives and Echo into the 501st Legion . Redeployment . Rex and Skywalker soon returned to Coruscant , where Rex manned a blaster training range to maintain his troops ' marksmanship skills . Just over a week after their return , word reached the Jedi High Council that General Grievous was targeting the planet Bothawui , home to the key Republic - affiliated Bothan Spynet . Skywalker was subsequently given command of his own battle group to defend the strategic world from the Confederacy . Kenobi , who was out of action due to being injured in a recent terrorist bombing , had Rex and the 501st Legion put on standby , knowing that Skywalker would want them for his strike force . After receiving his orders , Rex got his men settled on the " Resolute " , which was being prepared for Skywalker ' s fleet along with two other " Venator " - class Star Destroyers , the " Pioneer " and " Dauntless " . He enjoyed a brief reunion with Skywalker and Tano , who were pleased that he had been assigned to their task force . Once all was ready , they set off for the Both system , with Grievous and an armada of four " Munificent " - class star frigates pursuing them there . Although they beat Grievous to Bothawui , Rex , Skywalker , and Tano learned from Kenobi that Grievous had not abandoned his pursuit of them . As Kenobi told them , Grievous was still on course to the Both system , having merely stopped to take on two additional frigates , which he had used to overwhelm Republic forces on the planet Falleen . Despite being outnumbered two - to - one in vessels , Skywalker was intent on protecting Bothawui and was unwilling to let it fall to the Confederacy . He deployed a detachment of AT - TE walkers under Rex ' s command to the asteroid belt surrounding the gas giant Bothawui Prime , from where they would be able to outflank Grievous once his fleet passed through the asteroids . After Grievous ' s frigates arrived in the system , proceeded through the asteroid belt — as well as the AT - TEs hidden there — and opened fire on the Republic Star Destroyers , Rex and his men turned the tide of the battle by attacking the frigates , targeting their aft sections . The ambush was all the more successful because the unsuspecting Grievous had diverted all of his frigates ' power to their forward shields instead of their rear ones . The " Resolute " , " Pioneer " , and " Dauntless " annihilated the trapped Separatist armada but not before Grievous could flee from his command ship . Skywalker ' s Delta - 7B starfighter took on damage while pursuing Grievous ' s personal starfighter , " Soulless One " , and veered off - course toward the asteroid belt . Rex led a search - and - rescue mission into the asteroid belt ; he managed to save Skywalker from his crippled starfighter but could not retrieve R2 - D2 , who had served as the Jedi General ' s astromech co - pilot . Rex and Tano met with Skywalker in the " Resolute " medbay once he had regained consciousness and brought him up to date with the battle ' s success , albeit with the loss of R2 - D2 . After conducting an unsuccessful search for his astromech droid , Skywalker was forced to declare R2 - D2 missing in action . Believing that the " Resolute " , " Dauntless " , and " Pioneer " could use modifications , Skywalker took his fleet back to the Allanteen Six shipyards , where they had been manufactured . Eventually , Kenobi contacted Skywalker and Tano and tasked them with finding a new Confederate listening post that was intercepting Grand Army transmissions . Departing from the shipyards on his new assignment , Skywalker elected to personally reconnoiter space suspected of Confederate activity while the rest of his forces concentrated on a more central path . Upon being informed of Skywalker ' s reconnaissance plan , Rex questioned whether he was sure about scouting ahead alone , but Skywalker was certain that more than one fighter would attract too much enemy attention . Skywalker brought along the replacement astromech droid R3 - S6 and departed from the " Resolute " in his retrieved Delta - 7B starfighter , unaware that R3 - S6 was a spy working for Grievous . Not long after Skywalker left , Tano received a signal from the homing beacon of her Master ' s interceptor — his covert position had been compromised . Rex quickly gathered a squad of troopers to accompany Tano aboard the " Twilight " , and they arrived to reinforce Skywalker , whom Grievous was cornering with two " Munificent " - class frigates and a squadron of Vulture droids . Because enemy fire had ruptured his hyperspace docking ring , Skywalker piloted his starfighter into the " Twilight " cargo bay to retreat aboard the freighter . With Rex and his men providing covering fire as gunners , Tano maneuvered the " Twilight " right between the adjacent wings of the enemy frigates . As soon as they were clear , Rex engaged the " Twilight " hyperdrive , executing a successful escape . A short while later , R2 - D2 , whom the scavenger Gha Nachkt had captured , was able to get a message through to the " Twilight " . Rex tracked the transmission ' s origin to Ruusan 2 , a moon of the planet Ruusan , where they proceeded to investigate the source . Within the upper atmosphere of Ruusan 2 , Rex and his comrades found Skytop Station , the Separatist listening post that they were after , and they concluded from R2 - D2 ' s message that the astromech droid was aboard the station . Despite orders from Kenobi to focus on sabotaging the enemy outpost , Skywalker resolved to mount a dual operation to destroy the base and save R2 - D2 . Once the " Twilight " entered the gassy atmosphere of the moon , Skywalker , Tano , Rex , and four other troopers used the Force and JT - 12 jetpacks , respectively , to safely land on the station many meters below . Rex carried R3 - S6 to the station at Tano ' s behest , a job he was not enthusiastic about undertaking because of the astromech ' s substantial weight . Upon landing with the heavy R3 - S6 in his arms , he insisted that he would never lug around an astromech droid again . Rex entered the station with the squad and joined another trooper in shooting down two B1 battle droid guards in their path . At a nearby computer terminal , R3 - S6 accessed the building schematics of the battlesphere , which Rex used to brief their team on the location of the station ' s reactors . If its reactors were destroyed , Skytop Station ' s repulsorlift generators would be compromised , which would consequently plummet the battlesphere to Ruusan 2 ' s surface . While Skywalker left to rescue R2 - D2 on his own , Rex , Tano , and their men went to plant explosives at the reactor room thirty levels below , where they found that an alarm had triggered the door ' s ray shield . R3 - S6 plugged into a terminal and tried to bypass the shield , but as time went on , Rex became doubtful of R3 - S6 ' s abilities and questioned them . Though Tano admonished him , telling him to be patient , R3 - S6 was actually stalling to give a battle droid patrol time to ambush the Republic team . The astromech droid ' s efforts succeeded when a squad of B1 battle droids reached their location and attacked them . While Tano deflected laser shots with her lightsaber , Rex and his men used the hallway ' s supports as cover and opened fire on the battle droids . Meanwhile , R3 - S6 activated the reactor room ' s secondary door , sealing off the Jedi and clones from the reactors . When B2 super battle droids arrived from the other direction , effectively outgunning the clone troopers and trapping them in a crossfire , Tano had Rex utilize electromagnetic pulse grenade s — nicknamed " droid poppers " — against their adversaries . A grenade tossed in both directions deactivated all of the droids , though the ensuing respite in fighting did not last long . Immediately thereafter , Grievous arrived and confronted the team , batting Tano aside and attacking Rex and the clone troopers . They targeted their blasterfire at Grievous but were knocked aside , and all of the troopers save for Rex and Denal were killed . As Grievous prepared to kill the unconscious Rex , Tano intervened mid - strike to block the cyborg general ' s blow with her own lightsaber . She continued to distract Grievous by drawing him into a storage room ; Rex and Denal learned of her exploits after regaining consciousness . Although Rex protested to Tano ' s course of action over a comlink transmission , he complied with her orders to complete their mission . He and Denal broke into the reactor room and planted the explosives , then departed for the landing bay to rendezvous with Skywalker and the " Twilight " . The Jedi General was alarmed to learn that Tano had engaged Grievous in single combat and insisted that they take him to assist her . As Rex and Denal headed for the hangar ' s exit with Skywalker and the " Twilight " clone trooper pilot , R3 - S6 sealed the blast doors and the rest of the exits . The astromech droid also activated several Vulture droids hanging from recharge racks on the roof to prevent the Jedi and clones from escaping , revealing his loyalties to Grievous and the Separatists . Surrounded by Vulture droids on one side and super battle droids on the other , Rex , Skywalker , and the troopers ran for cover behind several nearby crates while returning the droids ' blasterfire . During the ensuing firefight , Skywalker ordered Rex to activate the explosives at the reactors even though they were still in the station . Rex complied and detonated the charges , beginning Skytop Station ' s gravity - pulled descent into the atmosphere of Ruusan 2 . Presently , Tano — having escaped from Grievous — reached the hangar via a ventilation shaft and joined the fight , eliminating two of the Vulture droids . When Rex noticed several fuel cells close by , Skywalker called on the Force to hurtle one of them at the droids , and Rex placed a well - aimed shot on the cell . The resulting explosion obliterated all of the battle droids . Once R2 - D2 opened the hangar door via an external terminal , the Jedi and clones escaped from the doomed Skytop Station aboard the " Twilight " , and Skywalker completed their successful operation by finally retrieving his astromech droid . While Rex , Skywalker , Tano , and Kenobi were serving aboard the flagship of the Republic Navy , Tano intercepted a Rebel SOS signal from Tatooine . Determined to prove herself , she secretly took a shuttle to investigate the transmission ' s source . Rex , Skywalker , and Kenobi soon discovered her absence and also learned that the signal had been fake — Tano had fallen into a Separatist trap . The two Jedi Generals quickly took the " Twilight " to Tatooine , where they rescued Tano from a battle droid detachment . Mission to JanFathal . At least six months into the war , Rex agreed to relieve Skywalker of his Padawan for a few days by taking her along on a three - day shakedown cruise aboard Republic Navy Captain Gilad Pellaeon ' s newly refitted assault ship , " Leveler " , in the Dantus sector . After Pellaeon , an old acquaintance of his , permitted him to take part in " Leveler " testing session , Rex departed to join the cruise with Tano , Sergeant Coric , and six clone troopers new to Torrent Company — Ross , Boro , Joc , Hil , Vere , and Ince , who had completed their training several days prior . En route to " Leveler " aboard a shuttle , Tano questioned if her Master had taken a respite from training just for a break from her , but Rex abstained from directly answering to avoid speculating about Skywalker . He was more concerned about his new troops : He was considering using the inconsiderate tally sensor to tell the six apart because they had so far failed to display unique personalities . After Rex and his men arrived aboard " Leveler " , Pellaeon greeted them and allowed them to move into their barracks . At Tano ' s request , Rex took her to examine " Leveler " experimental concussion missiles , and Pellaeon joined them at one of the missile bays . Rex and Pellaeon were cut off from a discussion about " Leveler " new weapons by an alert that a flotilla of Confederate ships had exited hyperspace in the nearby Fath sector . While Rex and Pellaeon monitored the Separatist activity , Tano sensed a disturbance in the Force that , at Rex ' s advice , Pellaeon took seriously . Despite the possibility that the enemy activity would not result in anything , Rex took precautions and went to round up his men in case they were needed . After Rex returned to Torrent Company ' s barracks and relayed the situation , Joc ' s inquiries into Pellaeon ' s private life sparked a debate between Tano and the rookie clones about the Jedi Code ' s ban on emotional attachment . Rex ended the argument by putting his men on standby , while Tano departed to check out the ops room at his suggestion . Once she had left , Rex reproved his men for putting her on the spot but was also pleased that they were settling in and expressing themselves . In an effort to keep them occupied , he took his men to the hangar deck to perform some deck circuits and familiarize themselves with the Fath system , where " Leveler " was headed to keep a closer eye on the active Separatist armada . Rex contacted Skywalker to inform him of their diversion to the Fath system , and Skywalker responded by setting off to rendezvous with " Leveler " despite his captain ' s admission that his involvement was unnecessary . After taking a moment to shave his hair from a blue - dyed haircut — in support of the Sullustan Bylluran Athletic bolo - ball team — Rex joined Tano and Pellaeon on the bridge just as the warship became host to the Altisian Jedi sect . Jedi Master Djinn Altis , who spoke for the group , asked for permission to dock his freighter , " Wookiee Gunner " , on the grounds of receiving a distress signal from a Republic agent on the nearby planet JanFathal . Republic Intelligence confirmed Altis ' s story and reported that the agent had been captured during a Separatist - allied rebel uprising . Pellaeon approved the rendezvous with Altis , and Rex promised his men for the hostage extraction that they would soon be performing . However , matters were complicated when the captive operative was identified as Hallena Devis , a close acquaintance of Pellaeon . While Rex and his men were examining JanFathal ' s capital of Athar — where Devis was being held — via a holochart in " Leveler " meeting room , Altis and fellow Jedi Callista Masana and Geith Eris convened with them , Pellaeon , and Tano to formulate a plan to rescue Devis . As Pellaeon briefed the impromptu team on the objective at hand , Rex objected when Pellaeon implied that he intended to participate in the mission ; the clone captain cited that in the absence of embarked troops , the responsibility fell to him and his men . He noted that all they could hope for was a successful rescue operation and not a full - scale ouster of the Separatists from JanFathal . Eris and Masana voiced their desire to reconnoiter Athar on their own , as they did not approve of clone trooper production on account of their beliefs , but Rex and his men insisted that it was their job . With a plan in place , the team headed down to " Leveler " hangar bay , where a replenishment shuttle was prepared for them to take to JanFathal . Rex refused Pellaeon ' s suggestion to use civilian clothing , stating that he preferred armor advantages to stealth , and also assured the distressed Pellaeon that they would rescue Devis . Once the sensor technician Benb finished outfitting the shuttle , Rex and his men boarded the craft alongside Tano , Altis , Masana , and Eris . As Sergeant Coric flew them to Athar , Rex attempted to mediate a heated conversation between Tano and the Altisian Jedi , whose controversial beliefs conflicted with the orthodox Jedi principles upon which she had been raised . He also checked in with his rookie troopers over their private circuit and took pity on the new inductees , as they had not been prepared to be confronted with Jedi of such incongruous beliefs and behavior . After bypassing a Separatist landing craft , Coric landed the team ' s shuttle in the south district of Athar . Rex immediately disembarked with the others and headed for a nearby building , where Altis and Ross worked with a recording remote to observe the surrounding enemy deployments in the city . Rex , Tano , and Masana then moved in to reconnoiter the vicinity of the building where the Separatist - backed rebels were holding Devis . Rex formed a plan for a standard hostage extraction , electing to first secure the building ' s exit and then deploy teams to infiltrate the structure via the roof and front entrance . After the rest of the team joined them , Rex sent Altis with Joc , Ince , and Ross to cover the exit and led the others to enter the building via the roof . Once Altis had distracted Devis ' s captors — the young insurgents Merish Hath , Shil Kaval , and Varti — Rex and his men used explosives to open a hole in the roof and joined the Jedi in confronting the rebels . Though Varti , holding his blaster to Devis , tried to bargain with him , Rex surprised everyone by laconically shooting down Varti , subsequently freeing Devis . He used a vibroblade from his gauntlet to sever Devis ' s handcuffs and ushered her toward the exit , ignoring her attempts to retrieve her comlink from the badly wounded Kaval . After Devis had been moved to safety , the building began to crumble , and Rex charged out of the structure with Altis , Vere , and Boro . While Ince headed to Coric ' s shuttle with Devis , Rex joined the fight against an incoming force of battle droids . In the ensuing battle , Vere was wounded beyond help , leaving Rex pained with the loss of the rookie trooper . Although Boro tried to revive Vere , Rex told him to continue fighting , as Boro endangered his own life with every second he spent trying to help Vere . Launching grenades at the droid infantry with his rifle , Rex prepared to lay charges and sacrifice himself so that the others could escape , despite protests from both Tano and Boro . Before Rex could execute his plan , Altis , Masana , and Tano focused through the Force , toppling an adjacent building onto the droids and barricading the enemy ' s path with rubble . Rex contacted Coric and was surprised to learn that the sergeant — despite having been ordered to wait only for Devis and the Jedi — was landing nearby to extract the rest of the team . Although Coric had disobeyed orders , Rex was grateful that he had decided to return for them . Once all of the Jedi and clones were on board , Coric piloted the shuttle out of the area , barely evading the pursuant battle droids . En route to " Leveler " , Devis thanked Rex for his men ' s efforts , but he avoided initiating a conversation with her so as to reflect on Vere ' s death . He noticed that Ross , Boro , Joc , Hil , and Ince had opened up a private comlink frequency and respected their privacy , knowing they needed to discuss personal matters , including the painful loss of Vere , without him overhearing . He instead voiced his congratulations to his men on the successful rescue , though he noted that JanFathal was lost to the Republic . Meanwhile , the Separatist destroyer " Reaper " attacked " Leveler " and forced Pellaeon ' s warship to flee to hyperspace before Coric ' s shuttle could dock , leaving Rex and his team to fend for themselves . With their main source of life support — " Leveler " — gone , Rex ordered Coric to disable all nonessential systems . Boro calculated that with their limited oxygen supply , they would only be able to make it halfway to the shipyards at Kemla Yard , the closest Republic - allied location . Instead , they elected to return to Athar and mount a last stand against the Separatist army there . Shortly thereafter , Skywalker arrived in the system aboard the V - 19 Torrent starfighter Echo - 97 and contacted Rex , who updated him on their situation . Rex and the others rendezvoused with Skywalker in Athar , where Skywalker was introduced to the rookie clones and the Altisian Jedi . Rex and his men ' s spirits were lifted when Skywalker told them he had spotted several of the Separatists ' hyperdrive - equipped CR - 20 troop carriers , which could be used to escape off - world . Altis presently received word from his colleague Ash Jarvee that " Leveler " was returning to the system from a miscalculated hyperspace jump . In the meantime , Skywalker sent Rex , Masana , and the clone troopers to a road bridge along the Cadaman Royal Highway while he and the other Jedi seized a CR - 20 . Rex and his comrades would provide covering fire until the troop carrier lifted off and would then board the ship . Once Rex , Masana , and the clones were in position , Skywalker commandeered the troop carrier with Tano , Altis , Eris , and Devis and arrived to rescue them . Yet Ince was injured in battle with the droids , and Hil hurriedly treated him for his wounds . A Vulture droid approached and fired at some paving behind them , but Masana diverted the falling debris with the Force and edged over to attend to Ince . While Masana and the others carried the injured Ince onto the hovering troop carrier , Rex and Ross remained on the ground to keep the droid starfighter occupied . The Vulture droid landed and advanced on the two clones in walking mode , and Ross got the droid ' s attention while Rex tangled its legs with his rappel line , pulling himself toward the droid . He hung on despite its attempts to throw him off , causing the droid to become increasingly more tangled in the line . Rex and Ross ' s combined blasterfire brought down the droid , and they escaped to the CR - 20 , which Skywalker promptly piloted toward " Leveler " . While the wounded Ince was stabilized , the battle - weary Rex manned the CR - 20 ' s blaster cannons with Tano , returning fire at the attacking Separatist armada . As soon as their CR - 20 landed aboard " Leveler " , the assault ship escaped to hyperspace ; Ince , meanwhile , was rushed to the medbay . Rex joined his comrades there , trying to endure the aggravating wait for developments in Ince ' s case . When Ince died from blood loss , Rex , devastated and furious with the loss of a second soldier within a single day , took refuge in the mess hall . Tano found him there and consulted him about the Altisian Jedi views on the Clone Army , a discussion that soon undermined Rex ' s own beliefs as well as Tano ' s . Accepting that he and his comrades were making the best of an unwanted situation , Rex finally regained stability with his principles , though Tano found it more difficult to do so . Further campaigns . As the war continued , Rex participated in a battle on a world against anti - Republic forces with Skywalker and Tano . During the fighting , Rex oversaw the operation of the Republic ' s AV - 7 Antivehicle Cannons and had them return bombardment to the enemy artillery . Eventually , Skywalker learned that Trade Federation Viceroy Nute Gunray , a member of the ruling Separatist Council , had been arrested on the planet Rodia . While Tano departed to assist Jedi Master Luminara Unduli in transporting Gunray to Coruscant for trial , Skywalker and Rex stayed to maintain the Republic ' s position on the embattled world . When the Republic launched a later campaign to capture Confederate Head of State Count Dooku , Rex served with Skywalker , Tano , and Kenobi aboard the " Resolute " , searching for traces of the Sith Lord in the hopes that removing him from the Confederate leadership would effect a quicker end to the war . Once they located Dooku ' s " Munificent " - class star frigate in the Vanqor system , Skywalker and Kenobi infiltrated the frigate to detain the Separatist leader while Rex , remaining behind with Tano , took Wullf Yularen ' s place of commanding the " Resolute " , as the admiral was recovering from the previous run - in with the " Malevolence " . As soon as Skywalker and Kenobi were aboard Dooku ' s frigate , Rex had the " Resolute " move into position and open fire , crippling the enemy vessel . However , Dooku escaped aboard his solar sailer , and Skywalker and Kenobi gave pursuit in a stolen " Sheathipede " - class transport shuttle , ordering Rex and Tano to follow in any available craft . Although Skywalker and Kenobi crash - landed on the planet Vanqor alongside Dooku , a band of pirates brought the Sith Lord to their base on Florrum . After Tano retrieved Skywalker and Kenobi from Vanqor , Rex was present on the " Resolute " bridge when Masters Yoda and Mace Windu of the Jedi Council delivered new orders to them . Hondo Ohnaka , the leader of the pirate gang that had captured Dooku , had issued a ransom of a million credits for their prisoner , and Skywalker and Kenobi were to verify that the Florrum pirates had custody of Dooku so that the Republic could pay the ransom . Yet Ohnaka ' s pirates also briefly captured Skywalker and Kenobi , who failed to prevent Dooku from escaping from Florrum . While liberating the planet Queel from the Confederacy alongside Skywalker , Kenobi , and Tano , Rex accompanied the latter to eliminate the enemy ' s artillery encampment . Rex used a jetpack to cross a swamp to the artillery base , while Tano rode a large dragon - like creature . Attacking the battle droids guarding the blaster cannons , Tano threw a blaster battery at the artillery stations with the Force , and Rex detonated the explosive by shooting the flying target , annihilating the cannons . He and Tano then returned to the Republic ' s forward command post with Skywalker and Kenobi to receive an incoming message from the Jedi Temple on Coruscant . In a conference with Jedi Masters Yoda and Ki - Adi - Mundi , Skywalker and Tano were assigned to intercept the Separatist agent Messo — who had stolen a Republic data file — in the Mon Gazza system , while Kenobi was to finish the campaign on Queel . Rex went with Skywalker and Tano aboard the " Twilight " to undertake their assignment on the planet Mon Gazza , where Skywalker left to find Messo while Rex and Tano stayed behind to secure the freighter . After changing out of his usual armor , Rex donned a heavily covered - up disguise and traveled with Tano to find her Master . When Skywalker confronted Messo in a Podracing arena , he discovered that the enemy agent had already transferred the data file . To further complicate matters , Messo was killed in a collision with a Podracer before he could reveal any more information . Rex and Tano joined Skywalker in the stands to watch the race and learned that Skywalker , who believed that Messo ' s contact belonged to one of the teams in the racing circuit , had entered Tano as a contestant to go undercover with the other racers . They proceeded to the Podracing stalls to begin outfitting Tano ' s Podracer , with Rex , Skywalker , and R2 - D2 posing as her pit crew . The skilled Podracer Kidd Kareen became their prime suspect for being Messo ' s correspondent , as Tano learned via Jedi intelligence that several recent espionage incidents had coincided with the racing circuit ' s presence in the same system , with Kareen and his crew being present for each of the events . Once Kareen ' s crew had left their stall for the day , Tano kept Kareen occupied while Skywalker took a look around the stall , with Rex and R2 - D2 on lookout . However , Kareen ' s fellow crew member San Maxus caught Skywalker snooping around , and a fistfight erupted between the Jedi and Kareen ' s crew . Shortly after Rex joined the fray , Tano and Kareen returned and halted the fight , and Tano was forced to apologize for her crew ' s actions . Rex and his comrades hurriedly left to prepare when they learned that the Padawan ' s debut race was next . At the race , Rex and Skywalker tracked Tano ' s progress through the course via R2 - D2 ' s hololink , rushing to her aid when another Podracer rammed her from behind near the finish line . Although Tano ' s Podracer had been demolished in the crash , Kareen offered to loan her one of his spare Podracers . Rex and Skywalker later trailed Maxus into a pub and used R2 - D2 to eavesdrop on him . They discovered that Maxus was the Separatist spy when he contacted Count Dooku , and they also overheard Dooku arranging to have another agent collect the stolen Republic datachip from Maxus the next day . That day , during Tano ' s next race alongside Kareen and Maxus , Rex and Skywalker noticed Maxus recovering the stolen datachip from the Podracing pits and chased after him . Though Maxus escaped , he left the rest of Kareen ' s crew to engage them in blaster combat . While Rex and R2 - D2 fought off the Podracers , Skywalker departed to help his Padawan , and the Jedi managed to prevent Maxus from handing over the datachip to Asajj Ventress thanks to assistance from Kareen . With their task completed , Rex , Skywalker , and Tano bid farewell to Kareen before leaving Mon Gazza aboard the " Twilight " . The three reported their success to Kenobi , who was still on Queel . When rumors abounded of a new Confederate project in the Outer Rim , Rex became involved with sending Denal on various missions to counter the menace . While Denal was on Rodia investigating the rumors , Rex contacted him and ordered him to make way for Republic reinforcements by purging a nearby jungle clearing of battle droids . Once Denal had done so , Rex sent him to destroy a transport factory by activating its self - destruct mechanism . At Rex ' s behest , Denal next took a squad to Tatooine to scout out an allegedly deserted Separatist base , which was discovered to be teeming with droid forces . After Denal ' s team cleared the outpost of hostiles , Rex relayed the news that another enemy base — this time a research station — had been discovered on Tatooine . As the outpost was reportedly connected to the new Separatist project , Rex told Denal to act quickly before the facility could be evacuated and any evidence destroyed . Denal infiltrated the station and uncovered plans for a superweapon that could cloak entire armies from the Republic . He later destroyed the superweapon at its construction site on the ice world Orto Plutonia . Shortly after Denal returned to the Republic fleet and received commendations from Kenobi , Rex dispatched the trooper on yet another assignment . Rex was sent with Skywalker and Tano to the planet Taronda to secure raw materials that the Republic desperately needed . However , Taronda ' s resources were also of interest to the Separatists , who targeted a mining settlement on the world to divert the Republic ' s attention . With Vulture droid starfighters attacking from overhead , Skywalker had Rex gather the miners and prepare the encampment ' s deflector shield . Though Tano fell down a crevice leading to a mineshaft , Rex informed Skywalker of a more pressing matter : the arrival of a Separatist assault force composed of a C - 9979 troopship , Multi - Troop Transports , and multiple Armored Assault Tanks . After bringing the wounded civilians to safety , Rex triggered the shield and called in Republic reinforcements . Asajj Ventress materialized just beyond the shield and revealed that she had sent dwarf spider droids after Tano , but Rex told Skywalker to have faith in his Padawan and restrained him from confronting Ventress . She withdrew her droid forces from Taronda upon discovering that a Republic Star Destroyer was inbound . Rex thereafter deemed it safe to disable the shield , and Tano , who had defeated the spider droids on her own , soon rejoined him and Skywalker . When the Republic Ninth Fleet received a distress call from the " Deyvus " , a malfunctioning merchant starship locked on course with an unstable nebula , Rex , Skywalker , and Tano were sent to rescue the ship aboard the " Twilight " , as their craft was the nearest and fastest one available . On approach to the " Deyvus " , Rex noted that the damage appeared to be severe , with its ion drive gone critical and its stabilizers offline . As they prepared to send R2 - D2 to access the " Deyvus " maintenance systems , the vessel revealed a number of battle droid – manned laser cannons , leading Rex , Skywalker , and Tano to realize that it was a Separatist trap . Before they could maneuver the " Twilight " out of range , the droids targeted its engines ; Rex used a fire extinguisher to put out the accompanying flames in the cockpit . He informed Skywalker that another impact would cripple the " Twilight " , as its hull could not withstand further damage . While the " Twilight " began to be pulled toward the collapsing nebula , General Grievous holographically contacted Rex , Skywalker , and Tano and lured them aboard the " Deyvus " , from where he claimed to be watching their deaths . Skywalker had R2 - D2 begin repairing the " Twilight " engines and took Rex with him to the " Deyvus " to capture Grievous . Rex and Skywalker used a pair of grappling hooks to pull themselves toward the " Deyvus " through the void of space . Along the way , Rex questioned the boldness of their plan , to which Skywalker replied that it was boldness that distinguished them from the Separatists . Sneaking past the heavy laser cannons , Rex and Skywalker boarded the gun deck and proceeded into the " Deyvus " system of hallways . Before they could get far , B1 battle droids and shielded droidekas surrounded them . Skywalker responded by slicing a hole in an adjacent wall with his lightsaber to blaze a detour to the bridge , where they assumed Grievous was sequestered . They passed through three floors , eliminating all of the battle droids in their path . On the bridge , they discovered that Grievous was not aboard the " Deyvus " ; instead , a plethora of primed thermal detonators greeted them . Grievous contacted them from the safety of a Separatist cruiser and taunted their predictability before severing the connection . Skywalker quickly cut intersecting slices in the cockpit ' s roof with his lightsaber , and Rex blasted a hole through the weakened metal , allowing them to return to the " Twilight " moments before the " Deyvus " exploded . Though they failed to capture Grievous , they had foiled his trap for them . Eventually , the Jedi Order learned — via a datachip that Ros Lai , an outcast of the Nightsisters clan of Dathomir , had provided — that the Confederacy had entered into an alliance with the Nightsisters . Rex returned to Christophsis with Republic Senator Padmé Amidala , her protocol droid C - 3PO , and R2 - D2 to pursue Lai ' s leads about the new enemy partnership for the Jedi High Council . During their investigations , Amidala discovered that the Separatist Droid Army was mining for something on Christophsis , though she was unable to determine what . Amidala reported her findings to the High Council and prepared to leave Christophsis with Rex and her droids . Before they could get off - world , enemy forces shot down their ship , and Rex was injured in the subsequent crash . He , Amidala , C - 3PO , and R2 - D2 were imprisoned in the Separatist base , where the battle droids were conducting their mining operation . While there , they overheard their guards saying that the Confederacy was harvesting crystals from the planet core , which were to be used to power the " Devastation " , a newly constructed warship and the sister ship of the " Malevolence " . Skywalker and Kenobi — who had been sent with Clone Commander CC - 1004 , nicknamed " Gree , " to rescue Amidala — soon freed Rex and his friends from their prison cell . While C - 3PO and R2 - D2 remained behind to assist in the Jedi ' s continuing investigation , Amidala helped Rex to Gree ' s LAAT / i gunship , which had a medical console on standby for him . The Jedi later destroyed the " Devastation " before it could assault Coruscant , killing the Nightsister leader , Sai Sircu , and terminating her alliance with Dooku and the Confederacy . From Quell to Maridun . While stationed aboard the " Resolute " , Rex accompanied Skywalker , Tano , and Yularen to aid Jedi General Aayla Secura , whose fleet was being ambushed by Confederate forces in the Quell system . By the time the " Resolute " arrived over Quell , two of Secura ' s Star Destroyers had fallen to a fleet of " Munificent " - class frigates ; only Secura ' s command ship , the " Liberty " , was maintaining altitude . As the Separatists launched jetpack - equipped B2 - RP battle droids to board the " Liberty " , Rex , Skywalker , and Tano took several LAAT / i gunships with troops from the 501st Legion to evacuate Secura and her 327th Star Corps personnel from her crippled flagship . After Skywalker reached the cruiser ahead of the others , a B2 - RP battle droid intercepted the gunship carrying Rex and Tano , who pulled their clone trooper pilot to safety in the troop bay after the battle droid forced him out of the cockpit . The droid also sabotaged the gunship ' s controls , plunging the craft uncontrollably toward Secura ' s flagship . As soon as they crashed through the " Liberty " hull , Rex , Tano , and their squad jumped out of the burning transport without pause and began sprinting through the cruiser ' s corridors , disabling droids on their way to rendezvous with Skywalker and Secura . Rex and Tano caught up with Skywalker , Secura , and Marshal Commander CC - 5052 , nicknamed " Bly , " in one of the " Liberty " hallways , and they headed to the ventral hangar to escape aboard a " Consular " - class cruiser that Skywalker had called in . As the gangway was extended to the frigate , the Confederate fleet ' s intensifying cannonades caused an inferno to rage through the " Liberty " . Sacrificing himself , Skywalker Force - pushed Rex and the others into the airlock , sealing the blast doors shut in both directions , then used the Force to hold back the advancing flames . Despite his efforts , the inferno finally blasted through , throwing him against the airlock . Once Tano and Secura had brought the wounded Skywalker aboard , Bly and a co - pilot detached their " Consular " - class cruiser from the " Liberty " . Just as Bly was docking their frigate to the " Resolute " , a Vulture droid attack inadvertently activated the frigate ' s hyperdrive . Although the " Resolute " maneuvered away in time , the frigate jumped to hyperspace with the Jedi , clone officers , and other troop evacuees aboard . While Skywalker was treated in the medbay , Bly discovered that the navigation computer ' s incorrectly inputted coordinates had locked them on a collision course with a star in the Maridun system . Rex and Bly joined Secura and Tano on the bridge , and they decided to disengage the hyperdrive by shutting down all primary power units so that they could avoid colliding with the star . With Tano at the controls , Secura deactivated the frigate ' s power , bringing them out of hyperspace . Due to the vessel ' s uncontrollable speed and the lack of artificial gravity , Rex lost his grip on the back of Tano ' s seat and was smashed against Secura , breaking her hold on the power switch . Secura telekinetically reactivated the switch , enabling Tano to pilot the frigate out of its collision course with the star . Yet she could not stop the ship from heading toward the nearby planet Maridun . The frigate suffered damage while entering the planet ' s atmosphere before finally crash - landing . Rex , Bly , and the clones escaped first , and Rex helped another trooper out of the frigate while Tano and Secura jumped out with Skywalker , just before the ship exploded . Once they had erected a makeshift shelter for Skywalker from the wreckage , Secura , Tano , and Bly took their only surviving troopers — Cameron , Lucky , and Flash — to seek out medical aid for Skywalker while Rex stayed to watch over him . Before Tano left with the others , Rex assured her that he would take good care of her wounded Master and also wished her luck . Rex diligently guarded Skywalker through the night . When Skywalker finally awoke and tried to get up , Rex ran over and checked on his condition . However , a carnivorous mastiff phalone that had been watching the two for hours attacked Rex , pinning him and trapping his blaster hand under one of its claws . Rex managed to fire a shot , startling the creature and scaring it away , and aimed several final blasts at its retreating form . Skywalker fell back asleep and did not reawaken until the next morning . When he did , Rex insisted that he maintain his rest , but Skywalker told him that he could hear the mastiff phalones returning . Both of them drew their weapons just as two of the creatures arrived and attacked . Rex gunned one of the beasts down , but the other charged into the makeshift shelter , knocking both him and Skywalker aside . At that moment , Tano and Bly returned with Wag Too , a healer from Maridun ' s village of Lurmen colonists . Too wrapped a rope around the feet of the remaining mastiff phalone , and Tano assisted Too — as did Rex , despite an arm injury — in tugging on the rope to topple the creature . Once it had fallen to the ground , Too secured the rope around its legs , preventing it from inflicting further harm . Rex then followed Tano , Bly , and Too back to the Lurmen village , with Skywalker in tow on a stretcher cobbled together from the shelter ' s remains . While the Lurmen tended to Skywalker ' s wounds , Rex kept watch on the outskirts of the settlement . During his shift , he noticed the arrival of a Confederate troopship and reported it to Bly , who was back at the colony with the Jedi and ordered him to return . Rex joined the others in the seedpod hut where Skywalker was being treated . Given that Maridun was a neutral world , the Jedi and clones decided to abscond before the Separatists found them so as to ensure that the Lurmen did not suffer for hosting them . Rex and Bly aided Skywalker and , with Tano and Secura following behind , made for a nearby field of tall grass behind the village . While there , Rex and Tano discussed the Lurmen ' s pacifism , denouncing the colonists as cowardly until Secura intervened and asserted that it took courage to follow one ' s beliefs . When Skywalker suggested that they pilfer a shuttle from the Confederacy to escape off - world , Rex agreed with his Jedi General , eager to steal from the Separatists . Tano then noticed that a Separatist recon droid was spying on them . Rex joined her and Bly in pursuing the probe droid , but it was Secura who disabled the probe by maneuvering in front of it through the grasses . Searching for the probe ' s origin from atop a nearby tree , Rex and his comrades discovered the Separatists ' base and watched as General Lok Durd held a test run of his Defoliator , an experimental cannon capable of liquidating organic matter while leaving mechanical units unharmed . As Rex and Bly moved in for a closer look at the Defoliator , Durd sent two B1 battle droids — inadvertently , in the direction of the approaching clone troopers — to serve as test subjects . When the Defoliator Deployment Tank fired a capsule at the battle droids ' location , it birthed an expanding wave of fire that decimated all life in the area , flora or otherwise . Rex and Bly turned and fled for higher ground , firing their blasters ' ascension cables at the tree . Rex made it to safety , and though Bly tripped and misfired his cable , Secura swung down on a vine and pulled him to refuge . They watched as Durd departed with several squads of troops , and Skywalker concluded that Durd intended to test the Defoliator on the Lurmen village . Rex and the others resolved to protect the Lurmen , waiting until after nightfall to raid the Separatist base for a starship . Once Rex , Skywalker , and Bly had cut down the droid guards outside the facility , Tano and Secura opened the door , enabling the others to infiltrate the base . Using various crates as cover , Rex , Skywalker , and Bly reached the communication center and destroyed the droids in command . Rex noticed a pair of mobile shield generators and , at Skywalker ' s behest , helped Bly bring them aboard the " Sheathipede " - class shuttle that the Jedi had commandeered . When Rex and the others landed at the Lurmen village at daybreak , the Lurmen chieftain , Tee Watt Kaa , did not appreciate their return , as he believed that they had brought the Clone Wars to Maridun . Rex soon caught sight of Durd ' s inbound battle group from the village ' s perimeter . In spite of protest from Kaa , Rex and his comrades formed a seedpod barrier to protect the village from the imminent engagement with Durd , working in teams to haul the seedpods in front of the settlement . Once Bly and Tano had moved the shield generators into place , Rex noted that Durd ' s battle droids were holding position a considerable distance away ; Skywalker theorized that Durd would attempt to use his long - range artillery before mounting a charge . Sure enough , Durd had his droids fire a Defoliator shell , but the deflector shield proved effective in repelling the wave of destruction . Unable to do anything from afar , Durd sent in his first squad . While Skywalker , Tano , and Secura waded into the enemy ranks , Rex and Bly , remaining in front of the shield , provided covering fire with their DC - 15A blaster rifles . Although they defeated the first wave of droids , the second wave — comprising Durd ' s second and third squads — swiftly followed . Due to their superior numbers , numerous battle droids slipped past the three Jedi , forcing Rex and Bly to retreat behind the seedpod barrier . Despite the clones ' efforts , the droids breached both the deflector shield and the seedpod wall and marched into the village , eliminating the shield generators . Secura and Tano joined Rex and Bly in defending the Lurmen , while Skywalker disabled the Defoliator Deployment Tank and captured Durd . Aided by Too and several other Lurmen , who sacrificed their pacifist upbringings to repel the invaders from their colony , Rex and his comrades eradicated the battle droids , preventing them from demolishing the village . With the battle over , Rex and Bly ushered the captured Durd and his Aqualish aide , Pune Zignat , into the " Sheathipede " - class shuttle . Too thanked the group for their efforts , as did Kaa , who nonetheless questioned the cost of the victory . As the Jedi and clones prepared to leave Maridun , Admiral Yularen arrived in orbit with a fleet of Star Destroyers , having finally tracked the Jedi there from Quell . War on Orto Plutonia . When the Republic lost contact with Glid Station , a base on Orto Plutonia , Rex went with Skywalker , Kenobi , and a detail of cold assault troops to investigate the lack of response . They were accompanied by Chairman Chi Cho and Senator Riyo Chuchi from the orbiting moon of Pantora , which claimed the ice world as a protectorate due to its lack of sentient life . Upon arrival over Orto Plutonia aboard the " Resolute " , Rex , Skywalker , Kenobi , and the Pantoran dignitaries proceeded to Glid Station aboard a landing force of LAAT / i gunships . Rex and his men were forced to use cold assault armor that , while necessary for protection from the icy conditions , heavily restricted their movements in battle . After landing at the base and having his men place sensor beacons to survey the area , Rex followed Kenobi inside , where they discovered that the clone troopers within had been slaughtered , though there was no evidence of a battle with Separatist droids . Following their scouts ' discovery of a nearby Confederate base , Rex took several troopers aboard Freeco bikes to examine the facility with Skywalker and Kenobi . At the enemy outpost , which was composed of two connected XT Beetle Transports , Rex assisted Skywalker in placing sensors around the building before entering the complex with his general . Sorting through the communication records in the control center , Kenobi uncovered a holorecording of a large life form attacking a B1 battle droid . While Skywalker and Kenobi speculated as to what had attacked the droid , Rex reported that the droids ' log indicated that it had last been scouting the southern canyon . He returned to Glid Station with the other troopers while Skywalker and Kenobi followed up on the lead . As a storm brewed outside , the Jedi returned with news of their discovery — contrary to the findings of previous scouting parties , sentient life inhabited Orto Plutonia : a colony of the Talz species . Upon learning of the Talz , Cho sought to preserve Pantora ' s claim to Orto Plutonia and immediately ordered Rex to prepare his troops for battle with the Talz , but both Skywalker and Kenobi intervened and told him that they had arranged a meeting with the Talz to negotiate peace , much to Cho ' s chagrin . As the Republic forces prepared to leave for the rendezvous , Rex reported to Skywalker that their gunships would not be able to take off in the storm . Skywalker ordered the rest of the clone platoon to remain at Glid Station — despite Cho ' s aggressive claim to Orto Plutonia , the Jedi did not intend to go to war with the Talz . Rex set off with Cho , Chuchi , Skywalker , Kenobi , and their clone troops for the Confederate base , which was to serve as the neutral meeting ground with the Talz . Once there , Cho told Rex to position his men on a nearby ridge from which to ambush the Talz , but Kenobi countermanded the order , as the Talz had already arrived . Leaving Rex and the clone troopers outside with an explicit directive to avoid provoking the Talz , the Jedi and Pantorans entered into negotiations with Chieftain Thi - Sen . Despite the efforts of all other parties to prevent armed conflict , Cho declared war on the Talz in an effort to expunge them from Orto Plutonia , with no one present holding sufficient political authority to revoke his decision . While Skywalker , Kenobi , and Chuchi returned to Glid Station to determine a solution for the hostilities , Rex and his men took Freeco bikes and BARC speeders to accompany and protect Cho . When they encountered several narglatch - mounted Talz scouts near an ice ridge , Cho ordered the clones to open fire on the spot . Although Rex reminded Cho that they were only there for his protection , not to fight his crusade against the Talz , the captain and his troops were forced into battle when more Talz appeared and ambushed them . After a Talz warrior and his narglatch forced him out of his Freeco swoop , Rex retaliated by gunning down his attackers . He kicked over his bike for cover , ordering his men to do the same to form a defensive perimeter around Cho and his bodyguards from the Pantoran Guard . As the Talz flung spears at them , Rex ordered his men to retreat . Though Cho refused to pull back , one of the spears soon hit him , impaling him through the back . Acting with celerity , Rex slammed a BARC speeder into an advancing Talz and defended the wounded chairman from more of the warriors , doing his best to fend off Cho ' s attackers . He carried Cho onto a spare speeder and joined the rest of his men in their retreat . Yet further on , the collapse of an ice bridge across a gorge compromised their only path to safety . Despite being trapped between the ravine and the line of Talz warriors , Rex was ready to fight to the last man . As spears began to fly , he signaled the few survivors of his unit to use their vehicles as cover from the charging Talz . They countered the Talz ' s spears with blasterfire until Skywalker , Kenobi , and Chuchi presently landed at their position with several LAAT / i gunships and troop reinforcements . Though the Talz were forced to halt their offensive , both they and the clone troopers had suffered devastating casualties . After Cho , who remained hell - bent on eliminating the Talz to his last breath , succumbed to his injuries and passed on , Chuchi — having received proper jurisdiction from the Pantoran Assembly — negotiated an end to the bloodshed with Thi - Sen . She peaceably transferred control of Orto Plutonia to the Talz in recognition of their sovereign status . With the Battle of Orto Plutonia brought to an end , Rex and his men departed from the battlefield with Chuchi , Skywalker , and Kenobi aboard the gunships . Virus outbreak on Naboo . When the Separatist - allied Doctor Nuvo Vindi was discovered to be resurrecting the fatal Blue Shadow Virus in a laboratory on the planet Naboo , Rex was sent with Skywalker , Kenobi , Tano , and the clone units Snow Wolves , Calm Tree , and Wildfire to shut down Vindi ' s facility . Once Tano breached the underground lab with explosives , Rex and his men joined her in drawing the attention of the battle droid defenses so that Skywalker and Kenobi could infiltrate the lab from other locations without resistance . From an LAAT / i gunship , Rex and his men rappelled into one of the ruptured tunnels and followed Tano in cutting through a patrol of B1 and B2 battle droids . However , the arrival of two droidekas halted their charge , forcing them to retreat while returning the droids ' fire . As their men fell one by one , Rex and Tano were saved by Kenobi and the clone bomb squad , who collapsed part of the roof on the droidekas . Rex and his two remaining troopers followed Tano and Kenobi to a junction , where they decided to split up upon encountering more droids : Kenobi took the bomb squad to find Vindi ' s virus bomb s — which Vindi had designed to spread the Blue Shadow Virus to key Republic star systems — while Rex , Tano , and their squad stayed behind to engage the droids . Shortly thereafter , Vindi remotely activated the virus bombs . Once Rex and Tano had defeated the battle droids , they ran into Skywalker , Senator Padmé Amidala , and Representative Jar Jar Binks of Naboo — the latter two of whom had been captured by Vindi before Skywalker rescued them — at another junction . Skywalker informed Rex and Tano that one of the active bombs was missing and ordered them to split up and find Vindi ' s LEP servant droid , LEP - 86C8 , who , as Amidala recalled , had taken the bomb . While Tano and Rex searched for the bomb , Skywalker and Kenobi chased down Vindi before the scientist could escape from Naboo . When Amidala reported that she and Binks had retrieved the missing bomb from LEP - 86C8 in the arboretum , Tano and Rex quickly brought the bomb squad to deactivate it . The ordnance specialists finished disabling all of the virus bombs with only seconds to spare , much to the relief of Rex and the others . Meanwhile , Skywalker and Kenobi apprehended Vindi and left to escort him to Naboo ' s capital , Theed , for trial . Unbeknownst to the Republic forces , LEP - 86C8 had removed the virus vial from the last bomb before escaping . The droid used a spare explosive in the bomb room to release the Blue Shadow Virus into the laboratory . Rex was on patrol elsewhere in the lab with Tano and several troopers when LEP - 86C8 detonated the virus bomb , and they rushed for a safe room before the airborne virus could catch up to them . They were nearly sealed out of the safe room when its blast doors were triggered , but Tano held the doors open with the Force , allowing Rex and the other soldiers to jump through the crack . They in turn pried open the doors long enough for Tano to clear the jump . However , they discovered that some of the virus had entered the safe room , exposing them to the plague . Despite being infected , Rex believed that they could still contain the laboratory ' s remaining battle droids — in total numbering over a hundred — before they broke out and released the virus to Naboo ' s surface , even if such an act would be his last . Soon , Amidala and Binks , clad in enviro - suit s , let them out of the safe room , dismayed that they could not do anything to help their infected comrades . After offering a DC - 15S to Amidala , Rex joined Tano and another trooper in cutting off the battle droids from the bunker ' s north corridor , while Amidala , Binks , and the other troops took the south passage . They met halfway at an exit hatch , where Rex helped Amidala gun down the last battle droid attempting to cut through the hatch . Over the next six hours , Rex and his comrades continued through the compound . When they were faced with a pair of droidekas , Rex and the others provided covering fire for Tano as she charged at and engaged the droids . Although Tano finished off the droidekas , Amidala ' s enviro - suit was breached in the ambush , and she was consequently infected with the virus . Nevertheless , Amidala remained committed to eradicating the Separatist forces . Rex and the others did not stop until they had rooted out and eliminated the last of the droids , completing their objective within thirty hours — by which point , four clone troopers besides Rex had been exposed to the virus . As the disease took its toll , Rex aided Amidala in tending to the other infected soldiers . While Amidala lamented the clones ' wasted lives , Rex replied that it was what they had been born to do . Tano thereafter fainted from the virus ' s effects , and Rex caught her as she collapsed . Meanwhile , Skywalker and Kenobi collected a sample of reeksa root — a cure for the Blue Shadow Virus — from the planet Iego and returned to Naboo . They thus neutralized the virus with the antidote , just in time to save their friends . Expected to make a full recovery , Rex and the other afflicted were placed on mobile stretchers and brought onto the complex ' s landing pad , where 2 - 1B medical droids ushered them onto waiting LAAT / i gunships . Before departing , the ailing Rex made it clear to Kenobi that he did not intend to help train Binks , whom Amidala had recommended for blaster training . Rex later healed and returned to fighting shape . For his part in protecting the Naboo people from the virus , Naboo ' s Theed Arms gifted Rex with a set of specially chromium - plated blaster pistols dubbed the " Vigilance " and " Negotiator . " Ryloth and its aftermath . Rex was deployed aboard a Republic fleet led by Skywalker , Tano , and Yularen to the Twi ' lek homeworld of Ryloth , which the Confederacy had earlier seized with the aid of the Techno Union . They were tasked with eliminating the Separatist blockade of Ryloth to secure passage to the surface for a Republic invasion force under the command of Kenobi and Mace Windu . During Skywalker and Tano ' s first assault on the blockade , the arrival of Separatist reinforcements forced the Star Destroyers " Resolute " and " Defender " to withdraw from the Ryloth system , while the " Redeemer " collapsed to enemy fire . Yularen was injured , and Tano , who led Blue Squadron in her first command position , lost the majority of her men . As the " Resolute " and " Defender " reached their staging area , Windu asked for a status update from the " Resolute " , prompting Rex to go looking for Skywalker . He found his Jedi General in the hangar with Tano , who was distraught from the loss of her squadron , and told him of the incoming transmission . After compiling a damage report for Skywalker , Rex joined him on the bridge to speak with Kenobi and Windu , who granted Skywalker a single planetary rotation to complete his assignment . At his general ' s request , Rex went to locate Tano and found her in the medbay visiting Yularen ; she left with Rex upon hearing that her Master was looking for her . Rex later received word of a complication aboard the " Defender " , which had been hit heavily during the engagement , and notified Skywalker via comlink . Due to the " Defender " damages , Skywalker devised a plan to sacrifice the cruiser . He intended to pilot it into a collision with the lead ship of the Separatist blockade , which would leave the enemy fleet in disarray without its commander , Captain Mar Tuuk . Skywalker thus ordered the " Defender " evacuated , and Rex helped him supervise the processing of the " Defender " supplies as LAAT / i gunships transferred its matériel to the " Resolute " hangar bay . When Tano arrived , Rex stepped in to oversee the cargo sorting while Skywalker explained his plan to his Padawan . Tano ' s role involved her assuming command of the " Resolute " to assault the remainder of the blockade . Though she felt unprepared to do so , Skywalker continued on and gathered Rex and their men , informing them that Tano would fill them in on the full plan . Before Skywalker left for the " Defender " , Rex asked him to leave some battle droids for him and the clones , though Skywalker made no promises . With Yularen still out of action , Rex joined Tano and the " Resolute " navigation officer on the bridge to coordinate their next move . Upon hearing Skywalker ' s plan from Tano , Rex , believing that the odds were not in their favor , voiced hesitancy along with the naval officer about the strategy ' s chance for success . Once Skywalker had annihilated the blockade ' s command ship , the " Resolute " would be exposed to attack from the Confederacy ' s six remaining " Munificent " - class frigates . To counter the enemy firepower , Tano proposed that they angle the " Resolute " hull toward the Confederate frigates , drawing them in with a classic Marg Sabl maneuver , at which point Republic starfighters would launch to outflank them . Both Rex and the naval officer were apprehensive about employing a risky Marg Sabl , but a convalescent Yularen arrived to support Tano ' s proposal . Upon their return to the Ryloth system , Tano delegated command of the " Resolute " to Rex and Yularen while she prepared to oversee the starfighter assault . The " Resolute " moved into place following the " Defender " obliteration of the Confederate command ship , but the other frigates did not immediately converge on the " Resolute " . Though Rex and Yularen concluded that they would have to retreat if the Separatists did not attack , Tano advised them to be patient , believing that the frigates ' droid commanders would take the bait . Sure enough , the frigates moved in just a few moments later , and Tano responded by leading several Y - wing bomber squadrons into battle against them . The Separatist blockade was outflanked , and Kenobi and Windu thereafter arrived with the invasion troops aboard a trio of " Acclamator " - class transports . After referring the Jedi Masters through to Tano , Rex sent a shuttle to retrieve Skywalker ' s escape pod . With the blockade broken , Kenobi and Windu were able to land their forces and recaptured Ryloth ' s capital , Lessu . They also arrested Techno Union Foreman Wat Tambor , who had overseen the Confederate invasion . Following the Battle of Lessu , Rex , Skywalker , Tano , and the 501st Legion were tasked with clearing out the remaining Confederate holdouts on Ryloth , which — in spite of the capture of Tambor and their defeat at Lessu — were refusing to surrender to the Republic . Rex landed his troops in the wastelands near the city Resdin , where the Separatists were based , and led an assault on the battle droid infantry there . He waded into the fray and gunned down a number of battle droids before Skywalker and Tano joined him ; the pair proceeded to infiltrate the enemy ' s position . Rex and ARF Sergeant Boomer caught up with the Jedi on the city outskirts after they had defeated an octuptarra magna tri - droid , reporting that all of the droids in the area had been eliminated . Rex then joined Skywalker ; Tano ; Clone Sergeant CS - 1004 , nicknamed " Kano " ; and trooper CT - 3899 , nicknamed " Rookie , " on an LAAT / i gunship into the ruined city , where their squad disembarked . Rex reported that their patrols had encountered stiff resistance from the Confederacy , and he cautioned Skywalker and Tano as they departed to reactivate the city ' s outer holo - bridges . They succeeded in restoring power to the bridges , allowing the 501st Legion to enter Resdin . That night , Rex went on a patrol of Resdin with Boomer aboard All Terrain Recon Transports . They found a myriad of battle droids in the city streets and fought through the enemy squads . After they exited a narrow alley and reached a large area below , more groups of B1 , B2 , and DSD1 battle droids ambushed them . The two troopers used their AT - RT walkers ' cannons to decimate the droids and entered another street . Rex and Boomer noticed a suspicious figure running out from behind a building amidst the shadows , and they dismounted for a closer look . Rex reported the strange activity to Skywalker and Tano , but just as he transmitted his coordinates , he and Boomer were attacked by the figure whom they had spied — notorious bounty hunter Cad Bane . Bane took the two clones hostage and brought them to an underground hangar , where they awoke in binders . With their binders wired with explosive charges , Rex and Boomer were forced to help Bane transport a crate he had stolen to his ship , though they first had to contend with a contingent of Separatist battle droids that broke into the facility . Once Bane unlinked their binders and let them retrieve their blasters , Rex and Boomer joined the bounty hunter in battling the droids , using several crates as cover . Rex closed the main hangar door and several auxiliary hatches via computer terminals , sealing out the droids . A Vulture droid thereafter broke through , but Rex used a rocket launcher from Bane to make short work of the droid . Though Boomer believed they could defeat Bane , Rex kept him focused on the matter at hand when Separatist reinforcements turned up in the form of B1 , B2 , and sabotage droid s . Skywalker and Tano soon arrived and grudgingly decided to assist Bane , helping to eliminate the incoming droids . Bane then opened fire on Rex and his comrades , but Skywalker rebounded his blasterfire , forcing the bounty hunter off a platform . Upon learning of Bane ' s " arrangement " with the cuffed Rex and Boomer , Skywalker severed their binders with his lightsaber , neutralizing Bane ' s bargaining chips , and had the clones disarm Bane of his LL - 30 blaster pistols . As explosions began to shake the hangar , Bane offered his Telgorn dropship , the " Sleight of Hand " , as an escape craft . Skywalker accepted Bane ' s offer and sent Rex and Boomer to find an elevated position from where to provide covering fire from the surrounding battle droids . Rex and Boomer took a path overlooking Ryloth ' s wastes , gunning down numerous droids along the way , including several tri - droids . Once they had cleared the way and were in position , Rex commed Skywalker , who came to join them with Tano , Bane , and the latter ' s crate , which Skywalker intended to have the Republic investigate . While Rex and Boomer engaged the droids above a canyon , the others pressed through enemy waves below . When the Jedi found starship wreckage blocking their path , Rex fired a rocket at the rubble , allowing them to climb over the debris . Skywalker , Tano , and Bane soon began to move out of range , and Skywalker thanked Rex for the assistance , ordering him and Boomer to rendezvous with them at the " Sleight of Hand " . They arrived at the dropship a short while later to find Skywalker and Tano in mid - battle with the Separatist scientist Kul Teska , from whom Bane had stolen the crate . Although Teska encased Skywalker and Tano inside an energy bubble , Skywalker told Rex and Boomer to focus on Teska instead of rescuing them ; the two troopers complied and engaged him in combat . Teska issued to them an ultimatum : kill him or save their Jedi commanders , promptly programming the energy bubble to close in on Skywalker and Tano . Rex and Boomer came to the Jedi ' s aid and disabled the sphere , while Teska boarded the " Sleight of Hand " and escaped off - world with his retrieved crate . Though Rex was disheartened by his failure to prevent Teska ' s getaway , Skywalker thanked him and Boomer for rescuing them . Meanwhile , Tano discovered that Bane had also absconded . Following the conclusion of the Battle of Ryloth , the Jedi High Council learned that Teska , based out of an underground base on the planet Behpour , was planning on collapsing the Naboo system ' s sun with a superweapon known as the gravitic polarization beam . Rex and Cody were dispatched alongside Skywalker , Tano , Kenobi , and Windu to destroy the facility with a clone battle group . Rex and Cody staged a diversionary assault , marching through a canyon on AT - RT walkers and demolishing all Separatist forces they encountered , so that Skywalker and Kenobi could infiltrate the base and disable its deflector shields . With Rex and Cody distracting the droids , Skywalker and Kenobi deactivated the shield barrier , in turn enabling Windu and Tano to enter the underground facility and secure the entrance with the main detachment of troops . Inside , Rex and Cody rendezvoused with Clone Commander CC - 6454 , nicknamed " Ponds , " whom Windu had sent to help them set up an evacuation zone for their forces . The trio fought their way through the base and secured a landing pad , where Rex destroyed a Vulture droid with a series of rockets . From a computer terminal , Cody used the base ' s emergency beacon to signal R2 - D2 , who piloted the " Twilight " to the platform to serve as an escape vessel . Eventually , Count Dooku came in person to confront Rex , Cody , and Ponds , and though they directed blasterfire at him , Dooku Force - pushed them into the " Twilight " cargo bay and sealed its hatch shut . Dooku then used the Force to topple a beam onto the " Twilight " , plunging the clones and their ship into the abyss below . However , Rex and his comrades survived the fall and returned to rescue Kenobi and Windu — who had begun a duel with Dooku — just as falling debris impacted the platform ' s supports . Once Kenobi and Windu had boarded the " Twilight " , Rex and the others withdrew from the base , which was beginning to collapse . At Kenobi ' s recommendation , they hovered above the entrance and waited around long enough for Skywalker and Tano , who were still inside , having been delegated the task of disabling the gravitic polarization beam . Skywalker and Tano soon arrived with Padmé Amidala , whom they had rescued from Teska ' s custody , and jumped aboard the " Twilight " from stolen STAPs . Rex congratulated them on their victory , and they left Behpour shortly before the sabotaged superweapon imploded the base , claiming Teska ' s life and the local site along with it . In service to the Republic . Felucia and Devaron . Following a Confederate invasion of the contested world of Felucia , Rex was among the troops sent to defend the planet alongside Skywalker , Tano , Kenobi , and Cody . Their contingent of clone troopers became based in a jungle clearing , from where they launched strikes on the outlying droid infantry . However , Rex and his comrades were soon surrounded and overwhelmed , and they called for an evacuation . Once LAAT / i gunships led by Plo Koon had broken through the Separatists ' orbital defenses and had landed in the clearing , Rex and Cody herded their men onto the gunships , backing into one of the vessels while returning blasterfire at the encroaching battle droids . As soon as Skywalker and Kenobi had joined them on the gunship , they went to retrieve Tano , who was overseeing a jungle patrol elsewhere . Although Tano initially refused to retreat , Skywalker had the gunships land between her patrol and the droid army , forcing her to disengage from the fight and join Rex and the others aboard their craft . They lifted off just as droid reinforcements annihilated the ground vehicles that Tano had abandoned . Although the Republic was unable to hold Felucia , it was not long before Rex returned to the war zone . He next joined Skywalker , Tano , and Admiral Yularen aboard the " Resolute " on their assignment to intercept Cad Bane , who had stolen a holocron from the Jedi Temple Archives . They proceeded to the Devaron system , where Bane ' s next target , Jedi Master Bolla Ropal , had last been heard from . By the time the " Resolute " arrived at Devaron , Bane had already captured Ropal to access the Kyber memory crystal , a device whose safety had been entrusted to Ropal . As Bane was rendezvousing with a Trade Federation fleet of " Munificent " - class star frigates , the " Resolute " moved in and opened fire on the frigates , decimating Bane ' s naval escort and stranding him in - system by disabling his command ship ' s hyperdrive . Assembling their forces in the " Resolute " hangar , Rex rounded up three brigades of troops for the impending mission . When he learned from Skywalker that they were to board the enemy frigate to rescue Ropal and the stolen holocron , he expressed hesitancy , as their only available assault craft were the " Twilight " and a few starfighters . In response , Skywalker decided that they would repurpose several available AT - TE walkers as landing craft . Although Yularen was appalled at the idea , both Rex and Tano recognized that the walkers were suitable for space and complimented Skywalker on his resourcefulness . Rex assigned Execute Battalion to Walker ATAT300 , while Carnivore Battalion was to use Walker 773 . Once the boarding party was ready , the " Resolute " maneuvered into position over Bane ' s frigate and dropped ATAT300 , 773 , and a third walker with the Jedi and clones aboard onto the hull of the enemy craft . While the AT - TE clone tank gunner s targeted several oncoming Vulture droid starfighters and droid - piloted STAPs , Rex and his men provided covering fire for Skywalker and Tano to eliminate the Vulture droids . Once the droids had been repelled , R2 - D2 opened a hatch on the frigate ' s hull , allowing Rex and the rest of the boarding party to enter the vessel . They then stormed the bridge , swiftly eradicating the frigate ' s battle droid crew — yet Bane was nowhere to be found . R2 - D2 soon uncovered a record of a holographic conversation between Bane and Trade Federation Viceroy Nute Gunray from the frigate ' s computer . Replaying part of the transmission , Rex , Skywalker , and Tano learned that Bane had now acquired the memory crystal as well as the holocron , having stolen the former from Ropal . On Skywalker ' s orders , Rex sent a squad of troopers to secure the hangar bay and disable the frigate ' s escape pods to prevent any enemy forces from escaping . Yet he refrained from accompanying the squad when explosions began to rock the ship as a result of Bane ' s remote activation of the self - destruct sequence . Rex instead joined Skywalker and Tano in searching the ship for Ropal . When Tano found Ropal dead in one of the holding cells below decks , Skywalker ordered Rex to have some of his men transfer Ropal ' s body to the " Resolute " . The deck lights were suddenly extinguished , and R2 - D2 used his headlamp to lead Rex and the others through the dark hallways in search of Bane . Upon blindly colliding with a protrusive pipe , Rex told his men to switch their helmet visors to night vision , doing so himself by pulling down his helmet scope . They soon caught sight of a fleeing Bane and pursued him to the gunnery deck , where Bane , having lured them there , revealed a detachment of battle - ready droids . As Rex and his comrades engaged the B1 and B2 battle droids with blasterfire , Bane decided to intensify the fight by switching off the artificial gravity . Rising off the ground , Rex and his men used their magnetic gripsoles to latch onto various footholds before resuming their efforts against the battle droids , with Rex securing himself on one of the artillery guns . When a blaster cannon – wielding trooper hit a disabled droid and inadvertently dislodged an ammunition canister from an artillery gun , Rex warned his men to check their aim to avoid detonating a shell . They continued the battle even after R2 - D2 reactivated the gravity generators . Shortly thereafter , Bane lured Tano into a trap , drawing her into a dead - end hallway and sealing the blast doors behind her . Skywalker rushed over and began to cut through the blast doors with his lightsaber to rescue his trapped Padawan . Presently , a battle droid tripped and misfired at an ammunition canister . The blast from the exploding shell caused debris to seal off Rex and the rest of his men from Skywalker . Unable to move the heavy mounds of rubble , Rex called out to his Jedi General and finally got a reply from him , confirming he was alive . At Skywalker ' s behest , Rex headed for the hangar bay with R2 - D2 and their troops to secure a transport with which to evacuate from the frigate . In the hangar , Rex found that the squad he had sent earlier was already confronting B1 and DSD1 dwarf spider droids that were guarding a " Sheathipede " - class shuttle . He and the others joined the fight for the shuttle , using crates as cover to return the advancing droids ' fire . Rex soon received word from Yularen that the frigate ' s main reactor was exposed and would implode at any moment . Splitting his forces , Rex sent troopers Denal and Koho to assist Skywalker and Tano in their pursuit of Bane . In the meantime , the captain and his men managed to cut a path through the droids and seized the shuttle . As Rex began to herd his troops aboard , he finally received word from Skywalker , who had rescued Tano and was heading to the hangar with her . He informed Skywalker that due to the danger that the reactor posed , they had to leave as soon as possible . The clone troopers held out against more battle droids long enough for Skywalker and Tano to arrive ; Rex immediately waved the two aboard the shuttle . Before jettisoning away from the frigate , the shuttle picked up Denal , whom Rex and his comrades had witnessed shoot Bane on an overhang above the hangar . However , the armor - clad trooper was , in fact , Bane , who had killed both Denal and Koho and had stolen the former ' s armor . When Skywalker questioned him , " Denal " alleged that he had been unable to retrieve the holocron from Bane . Rex ' s shuttle withdrew moments before the supply of ammunition aboard the frigate detonated , ripping the vessel apart . After reaching the " Resolute " , the Jedi and clones disembarked from the shuttle , though Rex and another trooper discovered that someone had left behind green blood on the shuttle ' s deck . Rex called Skywalker back aboard the transport and showed him their discovery , stating that the blood was definitely not from any of the clone troopers . Skywalker and Tano simultaneously realized the exploits of Bane , who bowled over Tano and promptly fled for the hangar ' s nearby stock of starfighters . Skywalker jumped onto the V - 19 Torrent starfighter that Bane was powering up , though since the bounty hunter was already in the cockpit , Skywalker was unable to do much interference . Rex , a recovered Tano , and the other present troopers could only watch as Bane forced Skywalker off his stolen starfighter and piloted it out of the " Resolute " hangar . Despite being alerted by Skywalker , Yularen was unable to lock down the hyperspace booster rings in time , and Bane appropriated one to escape to hyperspace . Though Bane remained at large , the Jedi Order later recovered the stolen holocron from his hideout . Following the Battle of Devaron , Rex returned to Coruscant with Skywalker and Tano . At one point , he was sent to take a priority message from the Jedi High Council to Jedi General Keelyvine Reus ; her Padawan , Tyzen Xebec ; Clone Commander CC - 4572 , nicknamed " Ganch " ; and the Agricultural Corps worker Sanya , who had just arrived at a local staging area aboard the Star Destroyer " Selfless " following a campaign on the planet Ukio . Rex informed Reus that she and Xebec were to report to Master Yoda at the Jedi Temple . He also offered to take Ganch , whom Reus had excused from duty , to spend some downtime at the Republic Service Organization center . Ganch accepted the invitation and brought along Sanya , while Xebec returned to the Temple with his Master . Ganch soon received word from Reus that he would not be required for her and Xebec ' s next operation . At the Service Organization ' s headquarters , Rex found Cody at one of the tables in the mess hall and , after introducing Ganch and Sanya to Cody , settled down to have a drink with his comrades . However , their downtime was cut short when Sanya discovered that someone had wired all of their chairs with remotely activated detonite charge s . Further investigation on Sanya ' s part revealed that only the clone soldiers ' chairs had been wired and that the detonators were all linked in series . Because the charges required simultaneous defusing , all available personnel from the Service Organization volunteered their services for the task . Although Rex was concerned with the amount of coordination that such a maneuver would require , the workers were able to disable the detonators under Cody ' s close supervision . When one staff member hastily made an exit , revealing herself as the infiltrator who had planted the explosives , Ganch and Sanya quickly went in pursuit of the saboteur , though they were unable to capture her . Ganch received fresh orders for redeployment with Reus shortly thereafter . The Zillo Beast of Malastare . When the Confederacy initiated a conquest of the planet Malastare , Rex accompanied Skywalker , Windu , and Commander Ponds to oversee the Republic ' s defense of the beleaguered planet , as the Grand Army coveted its vital fuel reserves . In what was to become one of the lengthiest and fiercest engagements of the war , the Separatists gained the upper hand with an army several thousand battle droids strong . Supreme Chancellor Palpatine responded by authorizing the use of the electro - proton bomb , a creation of Doctor Sionver Boll that would generate an electron field capable of deactivating the entire droid army . Rex was tasked with shoring up the fortifications of the Doge ' s Palace — the residence of Doge Nakha Urus , the leader of the Dugs — until the bomb was detonated , and he proceeded to the front of the palace ' s defense lines to command the Republic troops , monitoring the massive droid army ' s approach with a set of electrobinoculars . Once the battle droids launched their assault , Rex held the line with his men , working in tandem with squads of insectomorph - mounted Dug cavalier s to repel the droid infantry . Presently , a starfighter squadron dropped the electro - proton bomb in the middle of the droid army , producing an explosion that transformed into an electromagnetic pulse . The enlarging pulse disabled all of the droids and disrupted the clone troopers ' helmet systems for a short time . The bomb also destabilized the surrounding ground , and Rex and his troops turned tail and bolted away as the tremors birthed an enormous sinkhole . Rex nearly fell into the expanding sinkhole when he became trapped on an unstable plateau , but he managed to jump to higher ground with the help of his troops . While rescue teams searched for the Republic personnel trapped in the crater , Rex joined Skywalker , Windu , Urus , R2 - D2 , and Doctor Boll at the Doge ' s Palace , where they reestablished holographic communications with Palpatine . After Windu and Urus conferred with Palpatine on the status of the Republic ' s fuel treaty with the Dugs ' council , Rex reported that they had lost contact with the rescue team in the crater . Windu and Skywalker thus departed to respectively aid the rescue team and attend to the Dug leaders . Both Jedi soon found that the electro - proton bomb had awakened a colossal Zillo Beast in the crater ; not even Skywalker ' s lightsaber made so much as a dent on the creature ' s tough scales . As night fell , Rex met with Skywalker , Windu , and Boll at Urus ' s palace to discuss the problem of the uncontrollable Zillo Beast with Palpatine . While the Dugs wanted to kill off the Zillo Beast on account of an ages - old enmity with its kind , the Jedi wanted to preserve the creature , as it was one of the last of its near - extinct species . To appease the Dugs and ensure the ratification of the fuel treaty while also saving the Zillo Beast , Skywalker devised a plan to knock out the creature with the Republic ' s RX - 200 " Falchion " - class assault tanks and then transport it off - world , thereby concealing its survival from the Dugs . The following morning , Rex served with the unit that was sent to subdue the beast under the command of Skywalker and Windu . Once the Republic forces rendered the Zillo Beast unconscious using Skywalker ' s strategy , Rex returned with Skywalker and Windu to the Doge ' s Palace , where Urus and the other Dug leaders signed the fuel treaty . As the Republic forces prepared to depart from Malastare , complications arose regarding the matter of the Zillo Beast . Although the Jedi had planned to deliver the creature into serene solitude on an uninhabited world , Palpatine ordered that they bring it to Coruscant for study before its release into the wild . Rex returned to Coruscant with Skywalker , Windu , and Boll aboard an " Acclamator " - class transport . Back on the capital , the Zillo Beast was transferred to the Republic Science and Technical Center , where Boll began to analyze the creature ' s unusually durable scales in the hopes of synthesizing them into a new , impenetrable clone trooper armor . That evening , despite substantial containment measures , the Zillo Beast broke out of the Science and Technical Center and began to rampage across the ecumenopolis of Coruscant . As the creature headed for the Republic Executive Building , Rex joined an LAAT / i gunship force led by Kenobi and Windu that had set out to contain the beast . He contacted Skywalker through R2 - D2 , both of whom were with Palpatine and Padmé Amidala in the Chancellor ' s Suite at the Executive Building , and confirmed that he was to serve with Kenobi for the time being . Yet when Rex , Kenobi , and Windu reached the Senate Plaza with their detachment of clone troopers and stun tanks , they found that the Zillo Beast had taken hold of the H - 2 executive shuttle that Palpatine , Skywalker , and Amidala had been using to flee from the Executive Building with R2 - D2 and C - 3PO . Rex , monitoring the Zillo Beast and its captives through a pair of macrobinoculars , noticed that Skywalker was cutting the shuttle in half with his lightsaber and notified Windu . Kenobi deduced that Skywalker intended to free himself and the other passengers by severing the ship in two . While the recently arrived Yoda and Aayla Secura ran interference to distract the Zillo Beast , Skywalker finished slicing the shuttle in half , freeing himself and the others from the creature ' s grip . Kenobi and Windu quickly used the Force to stabilize the section of the shuttle carrying Palpatine and a Senate Commando , preventing them from falling off the dome of the Executive Building . While the stun tanks targeted the Zillo Beast , the LAAT / i gunships launched with Rex , Kenobi , Windu , and their men aboard and also opened fire , though neither approach proved effective in subduing the rampant beast . With no other options , Palpatine ordered the gunships to release toxic gas bombs that Boll had developed to kill the creature . Though the gas bombs proved successful , thus saving the Coruscanti populace from the Zillo Beast , the victory came at the price of the beast ' s life . The next morning , the slain Zillo Beast was transported back to the Science and Technical Center . Rex and his comrades met with Palpatine in the Senate Plaza to debrief the disaster , mourning the loss of the creature . While Rex and the others departed from the Senate Plaza aboard the gunships , Palpatine secretly gave Boll orders to clone the Zillo Beast . Return to Geonosis . In late 22 BBY , the Republic learned that Geonosian Archduke Poggle the Lesser had overseen the reconstruction of a major battle droid foundry for the Confederacy on Geonosis , despite the Republic ' s capture of the planet following the First Battle of Geonosis . In response , Rex took a detachment from the 501st Legion to reconnoiter Geonosis in preparation for a Republic assault . Upon arrival in orbit , his task force tried to hail the clone troopers on the surface but failed to establish contact . Conducting a preliminary scan , Rex discovered that the Geonosians had built not one but several droid foundries that were either nearing completion or already operational . In his report to the Jedi High Council , Rex classified the Geonosians ' actions as a major revolt and asserted that a full - scale planetary invasion would be necessary to retake the Outer Rim world . Before ending the transmission to Coruscant , he promised to provide a further analysis of the Geonosian defenses once he had completed his mission . Based on his findings , the Jedi Council authorized an immense invasion force to reclaim Geonosis and shut down its droid factories . Kenobi , Ki - Adi - Mundi , and Luminara Unduli were given overall command for the campaign and brought the invasion fleet to Geonosis , soon followed by the arrival of Skywalker and Tano , who had come from defending the planet Dorin from General Grievous . As the Republic fleet held position in orbit of Geonosis , Rex , Cody , and Mundi ' s clone commander , CC - 1993 , joined their Jedi officers aboard one of the Star Destroyers to plan out their attack . Cody led the briefing in the war room , explaining their plan for a three - pronged assault on the Geonosian defenses . As their main target was the ray shield generator protecting the droid factories , the invasion team would establish a staging area — termed " Point Rain " — before launching an attack on the Ray Shield Fortress . While Mundi and CC - 1993 , nicknamed " Jet , " would oversee the advance from the north , Kenobi and Cody would execute the central push , and Rex , Skywalker , and Tano would lead the assault from the south . All three teams would rendezvous at Point Rain and then assault the Ray Shield Fortress . With the plan set , the Jedi and their clone officers split up to begin preparations for the invasion . Once the fleet was ready , Rex , Skywalker , and Tano launched with their LAAT / i gunships and LAAT carriers , the latter craft hauling several AT - TE walkers ; their deployment followed and preceded that of Kenobi and Mundi , respectively . All of the gunships encountered stiff resistance from the Geonosians ' surface artillery and " Nantex " - class starfighter squadrons . The gunship carrying Rex , Skywalker , and Tano was among the first to be shot down , and they crashed near an encampment of blaster cannon – equipped Geonosian warriors . Once Skywalker heaved away the wreckage of the gunship , Rex joined him , Tano , and their men in assailing the Geonosian lines . After they lost their AT - TE walkers , Rex tried to hail Kenobi for reinforcements , but he learned from Cody — whose team had so far been the only one to reach Point Rain — that Kenobi ' s gunship had crashed . Ducking behind some rock cover with Skywalker , Rex informed him and Tano that Kenobi would be unable to provide support . Making do with their available resources , Rex and the Jedi led their men in rushing the blaster cannons . They pressed on toward Point Rain , but their trek led them through a canyon blocked by a massive Separatist barricade , riddled with hordes of gun emplacements and battle droids . Rex and his comrades rushed for cover from the incoming blasterfire ; several troopers were slain before they could reach safety . To collapse the wall and clear a path to Point Rain , Skywalker and Tano each took a backpack filled with thermal detonators and left Rex in command of the troops . While Skywalker and Tano ascended the barrier and fought through the thick droid defenses , Rex targeted one of the enemy cannons , gunning it down . He then had his men focus their fire on the battle droids atop the wall while he went to ascend the barrier himself . Rex aided Skywalker and Tano in their fight with a pair of droidekas , sneaking up on the one attacking Tano . He walked right through its deflector shield and shot it in the head ; the distraction also enabled Skywalker to eliminate the droid ' s companion . Skywalker and Tano wasted no time with tossing their primed detonator – laden backpacks into a nearby hatch , and they then used the Force to levitate Rex off the wall and into the air . They jumped off the barricade , with Rex falling close behind , just as the explosives tore through the wall . Skywalker and Tano used the Force to slow their descent as they landed , employing the same technique to cushion Rex ' s fall centimeters from the ground just as the barricade came crashing down around them . Rex and the others headed for Point Rain and soon caught sight of a number of smoldering Geonosians falling out of a clifftop cave close by . Skywalker recognized Mundi atop the cliff with his troopers and , via comlink , learned that Mundi ' s squad had taken a detour through the cave en route to the landing zone . Once Skywalker and Mundi had joined forces , all of them proceeded to Point Rain , where Cody and Kenobi were in desperate need of support against the Geonosians . Shortly after a Y - wing bomber squadron drove away most of the Geonosians from Point Rain , Rex and his comrades arrived , repelling the last of the enemy insurgents . After Rex and his fellow officers decided on a plan , they set out for their final objective : destroying the Ray Shield Fortress . Once Skywalker , Tano , and a small squad had disabled the Geonosians ' blaster cannons with EMP grenades , Cody moved in with the AT - TE walkers and took out the shield generator and its artillery stations . With the shield down , Rex , Mundi , and Jet landed at the Ray Shield Fortress with the main body of troops and forced the outnumbered Geonosians to surrender . Kenobi and Mundi , both wounded from the battle , returned to the fleet for treatment , leaving Rex , Skywalker , and Tano to eliminate the near - completed primary droid foundry , where Poggle the Lesser was holed up . Rex , Skywalker , and Tano moved their troops to the cliff opposite the factory , which was on the other side of an immense canyon spanned by a single bridge . Luminara Unduli ; her Padawan , Barriss Offee ; and Commander Gree soon arrived with reinforcements , and Rex greeted Unduli and Offee when their gunship landed and directed them to Skywalker and Tano . Together , the four Jedi devised a plan to cripple the droid foundry : Skywalker and Unduli would spearhead an assault on the foundry , acting as decoys for Tano and Offee to infiltrate the facility via the network of catacombs beneath it and plant explosives at the main reactor . Although a full frontal offensive would be risky due to the lack of cover along the canyon bridge , Skywalker and Unduli hoped to consequently entice Poggle into engaging them in open warfare . After the two Padawans had departed , Skywalker and Unduli began the assault . Deployed factions of B1 and B2 battle droids intercepted them on the canyon bridge , and Rex and his fellow officers headed the charge on the Separatists . Despite a Geonosian offensive from the rear , the Jedi and clones maintained their parade - style march toward the factory . When several droidekas rolled into range and opened fire , Rex ordered trooper Draa forward with an RPS - 6 rocket launcher . Draa blasted the droidekas to smithereens in one shot , and the heavy firepower from the battle group ' s AT - TE walkers impeded the remaining droid forces . Rex and his troops were thereafter faced with the deployment of several droid - manned super tanks , which Poggle ' s foundry had just finished manufacturing . At Skywalker ' s behest , Rex mobilized four AV - 7 Antivehicle Cannons , having them open fire on the super tanks just as they reached the opposite end of the bridge . However , the ray - shielded tanks withstood the dense cannonades and pressed onward . Rex was forced to take cover with Skywalker , Unduli , Gree , and their men when the super tanks released a multitude of warheads at their position . The ensuing bombardment obliterated the heavy cannons and AT - TE walkers , and the clone troopers also suffered significant casualties . When Skywalker ordered Rex to have the troops fall back , Rex was initially adamant against retreating , but he complied when Skywalker detailed his plan : After the tanks had reached the bridge , Skywalker and Unduli would collapse it with explosives . Once Rex and his men retreated , luring the tanks onto the span , Skywalker and Unduli swung under the pass hand by hand and planted thermal detonators on its underside . When they had reached the other side , Skywalker activated the charges , collapsing the bridge and plunging the super tanks into the deep chasm below . While waiting with Unduli for their Padawans outside the foundry , Skywalker commed Rex and questioned whether he had spotted Tano or Offee from his side of the canyon . Rex replied that he had not yet sighted either Padawan and also urged Skywalker to board an evacuation ship , though Skywalker refused to leave without Tano . Meanwhile , Poggle and a squad of Geonosians intercepted Tano and Offee at the foundry ' s reactor . When the enemy soldiers stole their explosives , the two Padawans saw no other choice but to use a super tank to destroy the power generator , sacrificing themselves to liquidate the facility . Once the rubble settled , Rex and Gree found Skywalker and Unduli amidst the debris field aboard an LAAT / i gunship . Rex reported to his generals that the LAAT carriers were moving the debris to search for the Padawans , who had been buried with the remains of the factory . Though Rex and his men did their best to locate the trapped duo , it was Tano who signaled them to her and Offee ' s location by boosting her comlink ' s reception with a power cell from the super tank . Rex and his fellow officers proceeded to the indicated area , and Skywalker and Unduli elected to lift the debris with the Force , despite Rex ' s offer to have the gunships move the heavy rubble . Once their super tank had been freed , Tano and Offee emerged , grimy but otherwise unscathed . Rex and his men looked on as the Padawans enjoyed a reunion with their Masters . Following the decimation of the main foundry , Rex went with Tano and Offee to one of the Republic ' s staging areas , where he sent them back to the fleet for a much - deserved rest . Before departing aboard a medical convoy of gunships , Tano and Offee promised to return soon . Meanwhile , as other key droid factories were eliminated , Kenobi and Unduli initiated a manhunt for Poggle to bring him to justice . They and Skywalker eventually captured the Separatist leader in the catacombs beneath the Progate Temple , the lair of Geonosian Queen Karina the Great , who perished during their escape from the catacombs . With Karina dead , the Republic triumphed over the Geonosians and cemented its control of Geonosis . Shortly thereafter , Tano and Offee were assigned to take the Republic " Pelta " - class frigate TB - 73 on a supply run to a medical station near the planet Ord Cestus . In the meantime , Rex accompanied Skywalker , Kenobi , Mundi , and Unduli aboard a " Venator " - class Star Destroyer to escort the captive Poggle to Coruscant for trial . At one point during their voyage through hyperspace , Rex accompanied the four Jedi Generals to the bridge to discuss a complication . Unduli had discovered that the Padawans ' transport had failed to check in on schedule , and when she tried to contact TB - 73 , the crew was unresponsive . While Skywalker concluded that something was wrong , Kenobi convinced him that it was not worth worrying over . Mundi turned their attention back to Poggle , who was resisting their questioning and refused to disclose any Confederacy military intelligence . Before leaving to continue interrogating Poggle with the other Jedi , Skywalker privately told Rex to remain on the lookout for any contact from Tano , which he agreed to do . Rex soon contacted TB - 73 himself , and Tano answered the transmission , expressing her relief to hear from him . Once Rex put Skywalker through , Tano reported that Geonosian brain worms had overrun her frigate . The worms , originating from Karina the Great ' s hive , were capable of mind control and had already infected most of TB - 73 ' s embarked troopers from Tango Company . After resolving to wheedle information on the worms from Poggle , Skywalker severed the connection and headed to the detention level . Skywalker soon rejoined Rex , Kenobi , Mundi , and Unduli on the bridge and reported Tano ' s predicament , continuing with the news that the worms were susceptible to cold temperatures . Since he had Force - choked the so - far - uncooperative Poggle to compel him to divulge the information , Skywalker evaded the other Jedi ' s inquiries as to how he had gleaned the information . He relayed the worms ' weakness to Tano , who neutralized them before TB - 73 reached the Ord Cestus medical station . Escapades at Saleucami . As the war entered its second year , the Jedi Order learned that General Grievous had captured Jedi Master Eeth Koth . Skywalker , Kenobi , and Master Adi Gallia mounted a rescue mission to save Koth from Grievous ' s clutches and also capture the cunning Separatist general . Rex and a squad of troopers accompanied Skywalker and Gallia aboard an " Eta " - class shuttle , which joined the rest of the assembled Republic fleet in orbit of Coruscant in preparation for the assault . From his " Arquitens " - class light cruiser , Kenobi contacted Rex , Skywalker , and Gallia aboard their shuttle and conveyed the plan : Kenobi himself would head to the Saleucami system with the Republic fleet , distract Grievous ' s forces there , and transmit the coordinates of Grievous ' s command ship , which the Jedi presumed was where Grievous was holding Koth captive . Skywalker ' s shuttle would then be able to jump into the system undetected , infiltrate the command ship , and rescue Koth . While Kenobi and the Republic fleet departed for Saleucami , Rex and the others waited above Coruscant for Kenobi ' s transmission . Once Kenobi and Cody had transmitted the exact coordinates of Grievous ' s " Recusant " - class light destroyer , Skywalker took their shuttle to join the battle over Saleucami . With Kenobi , Yularen , the " Resolute " , and the rest of the Republic fleet keeping the Confederate armada occupied , Skywalker ' s shuttle emerged from hyperspace and sped unopposed through the ongoing battle , quickly rotating upside down to dock to Grievous ' s destroyer . After securing the shuttle , Skywalker cut a hole in one of the command ship ' s hatches with his lightsaber and boarded the destroyer with Rex , Gallia , and their men . On Skywalker ' s orders , Rex and his men assumed guard positions around the hatch , as it was their only escape off the ship . While Skywalker and Gallia rescued Koth from captivity on the bridge , Grievous broke off from his ongoing duel with Kenobi aboard the Republic light cruiser and headed back to his own ship . Gallia subsequently went to prevent Grievous from escaping while Skywalker brought the weakened Koth back to the escape hatch , where Rex and the clones helped him into the shuttle before boarding themselves . As Skywalker released the shuttle from the destroyer , he and his comrades were contacted by Kenobi , who had pursued Grievous back to his command ship with Gallia , Cody , and several other clones ; Kenobi requested transport off the ship before they became trapped there , as Grievous was abandoning ship . Skywalker complied and took the shuttle to the destroyer ' s main hangar , where they retrieved Kenobi , Gallia , Cody , and another trooper before the destroyer was damaged by debris from the naval engagement . Although Rex and his comrades had saved Koth , they had not succeeded with their secondary objective of capturing Grievous . Nonetheless , the cyborg general ' s attempted escape was foiled when his C - 9979 troopship was hit by debris and forced to crash - land on Saleucami . Kenobi resolved to head to the surface with Rex and Cody to apprehend Grievous while Skywalker and Yularen continued the space battle . After Skywalker brought the shuttle to one of the Republic cruisers , Rex helped Koth onto the flight deck and then passed him on to Gallia and a 2 - 1B medical droid , who escorted him to a medical frigate . Rex and a contingent from the 501st Legion then joined Kenobi and Cody on an " Acclamator " - class assault ship for the voyage to Saleucami ' s surface . Once the transport had landed and unloaded its personnel and matériel , Kenobi briefed Rex on their plan : Instead of scattering their men to locate all of the enemy troopship ' s escape pods , they would investigate the crash site for leads about the escape pods ' drop zones . Rex traveled on a BARC speeder as Kenobi deployed their biker scouts and AT - TE walkers in search of the downed troopship . Upon arrival at the crash site , Rex and 501st trooper CT - 5597 , nicknamed " Jesse , " found that the troop compartments were damaged and relayed their findings to Kenobi and Cody . Kenobi decided to send teams to search for the escape pods , with Rex leading a patrol of Saleucami ' s wetlands . Before Rex departed with a 501st squad comprising troopers Jesse , Kix , and Hardcase , Kenobi instructed him to send back word before engaging Grievous if they happened to encounter the elusive general . While leading his men through the lush wetlands aboard BARC speeders , Rex became the target of a two - member droid commando sniper team . One of the droids fired at him with a sniper rifle , knocking him off his speeder with a shot through the chest . Rendered unconscious , Rex could only lie sprawled where he had fallen as his speeder crashed into some nearby brush . While Kix , the squad ' s medic , circled around to protect Rex , Jesse and Hardcase eliminated the droid commandos with rapid blasterfire . Lifting off Rex ' s helmet , Kix did a cursory examination but needed to remove his armor to discern the full extent of his wounds . Realizing that they were on farmland , Jesse , Hardcase , and Kix decided to head for the grounds ' homestead to find a safe place to tend to their fallen captain . After assembling a makeshift litter for Rex and affixing it to his own BARC speeder , Jesse led the team to the homestead with Rex in tow . They received permission from the Twi ' lek farmer Suu to use an eopie barn for Rex . Jesse , Hardcase , and Kix carried the still - unconscious Rex onto a bench , removing his armor and the top half of his black body glove so that Kix could properly tend to him . Rex finally regained consciousness after Kix had dressed his chest wound with a pair of bacta patch es , waking up to discover from Hardcase that had the potshot been two inches to the left , it would have passed straight through his heart and caused instantaneous death . He also found that he was unable to move his left arm due to nerve damage . Pulling himself up into a sitting position , Rex told Kix to patch him up so that they could continue the search for Grievous . However , Kix told him that his wound would take time and rest to heal , countermanding his orders with his authority as the team ' s medic . Rex ' s argument with Kix was cut short when Suu arrived at the barn with some food for the clones . Her daughter , Shaeeah , entered the room chasing a ball and , upon catching sight of Rex , blurted out that he resembled her own father , a comment that intrigued him and his comrades . Despite Suu ' s demonstration of kindness , Rex sensed that something was bothering her , though he could not fathom what it was . While Suu conferred with Jesse and gave him the plate of food , Kix dressed Rex in an arm sling to help avert his temporary paralysis . Hardcase retrieved one of the captain ' s DC - 17 blaster pistols from the pile of his armor on the ground , placing it next to him on the bench for easy accessibility . After Suu had left with Shaeeah , Rex — recognizing that he needed to rest if he wanted his injuries to heal — reluctantly ordered his men to continue searching for Grievous without him . He entrusted command of the squad to Jesse , who departed the farm with Kix and Hardcase , leaving Rex behind . As night fell , Rex fell asleep on his bench , but a nosy eopie interrupted his slumber , sniffing him and licking his face . He forced the animal away , sighing before returning to sleep . He was later awoken a second time by the furtive sounds of an approaching figure — the farmer , Suu ' s husband . Rex ' s eyes snapped open , but he decided to feign continued slumber while slowly reaching for his blaster pistol . Once the farmer was close enough , Rex struck out at his assailant with his blaster , but the farmer disarmed him with a staff . The unarmed Rex looked up at his host and was shocked to find himself staring at his own face — the farmer was also a clone trooper . Recognizing this as the cause of Suu ' s earlier unsettledness , Rex demanded to know the trooper ' s number and rank , but the clone instead introduced himself as Cut Lawquane , a simple farmer . Realizing that Lawquane was a deserter , Rex called him out on his sworn oath to the Republic , but Lawquane replied that his duty was to his family , not to killing as a soldier . Their heated argument was interrupted when Suu brought her and Lawquane ' s children , Shaeeah and Jek , to welcome their adoptive father home . After greeting his children , Lawquane invited Rex to dinner with his family , which he accepted when Shaeeah and Jek begged him to come . Putting the top half of his body glove back on , Rex joined the Lawquanes at their home , with him and Lawquane debating their distinct ideologies over a meal of roast nuna . Though Lawquane argued that the clones deserved more individuality , Rex countered that he was making an individual and deliberate choice to serve the Republic . Despite disagreeing , Lawquane respected his opinion , believing that everyone had a right to his or her own beliefs . After dinner , Rex and Lawquane continued their discussion of principles over a game of dejarik holochess . Following Rex ' s inquiries into the cause of his desertion from the Republic Military , Lawquane recounted his service in an engagement shortly after the First Battle of Geonosis . A devastating ambush by enemy battle droids had caused him to flee the carnage - laden battlefield , and he had subsequently begun to question his apparent expendability in the war . The wayward deserter eventually found his way to Saleucami and married Suu . A survivor of Geonosis himself , Rex sympathized with Lawquane and stated that he , too , had lost many brothers — whom he had come to regard as his family and home — during the course of his military career . They began to reach common ground , with Rex in particular gaining a newfound respect for the man he had at first labeled a disloyal deserter . In the meantime , Shaeeah and Jek received permission from Lawquane to play outside , prompting Rex to express his admiration of the children to their father . In response , Lawquane , perceiving that Rex believed he was a coward , voiced his determination to keep his children safe until his dying breath . Rex , Lawquane , and Suu jumped to their feet when Jek and Shaeeah returned to the homestead in screams . Learning from Shaeeah that " monsters " were following them , Lawquane grabbed a pair of electrobinoculars to discern what she meant . Training his binoculars through the dark fields , he spotted some twenty droid commandos , which had been deployed from a crashed Separatist escape pod that Shaeeah and Jek had happened upon . With the droid commandos beginning to surround the homestead , Lawquane prepared for a confrontation with the droids , locking the front door and sending Suu to take refuge upstairs with Jek and Shaeeah . When Rex inquired after Lawquane ' s weapon supply , Lawquane headed over to a closet and pulled out a blaster pistol for the captain , taking a rifle and carbine for himself . Rex volunteered a plan to catch the droids in a crossfire , but Lawquane cited the captain ' s injuries as a weakness and refused . Though taken aback by Lawquane ' s assertion , Rex grasped his meaning when the farmer clarified it for him : He was asking Rex to serve as a last line of defense for his family while he himself took point against the droids . Assuring Lawquane that he would take care of them , Rex went to join Suu , Shaeeah , and Jek in the bedroom on the second floor . Presently , the droids launched their attack on the homestead . Although Lawquane eliminated a number of them , several made it past him , and he warned Rex about the approaching droids . While Suu hid with Jek and Shaeeah by the bunk beds , Rex took up position , waiting at the end of the hallway leading to the stairwell doorway . Once the droid commandos had entered the hallway , Rex forsook his hiding spot and opened fire on them , gunning down a pair of the enemy units . While exchanging blasterfire with another of the droids , he managed to hit the droid in the head but not before it released a barrage of fire at the platform he was crouching on . Rex fell through the floor and landed beside Lawquane , losing his grip on his blaster in the process . One of the droid commandos seized Rex by the throat in a choke hold , but Lawquane grabbed the fallen blaster and shot the droid ' s head cleanly off . With that , the last of the droids was destroyed , ensuring the safety of Suu and the children . The next morning , Rex prepared to rendezvous with Kenobi ' s assault force , recovering his armor and borrowing one of Lawquane ' s eopies , onto which he loaded his other gear . When Suu asked if he was going to turn in Lawquane for his desertion from the Grand Army , he stated that doing so was his duty but that in his condition , he might not " remember " his meeting with them . His discretion earned him a relieved thanks from Suu , who was grateful that she would not be separated from her husband . Rex soon received a comlink contact from Kenobi , whose assault the previous night had failed to detain Grievous yet again . Kenobi was glad to hear that Rex was on the mend , informing him that their battle group was waiting for him before they left Saleucami . Although Lawquane offered Rex a place at his home , Rex politely refused , not intending to impose on the farmer ' s family , and stated that his own family was elsewhere . With that , he bade goodbye to the Lawquanes and set off to rejoin Kenobi , leaving with a broader view of a soldier ' s loyalties . Mandalorian affairs . The Mandalorian Death Watch , a terrorist splinter group allied with the Confederacy , later emerged in opposition to Duchess Satine Kryze of Mandalore and her dominant regime , the pacifistic New Mandalorians . With Kryze ' s life in danger , Rex was assigned with Skywalker , Kenobi , and Cody to escort Kryze to Coruscant , where she intended to reaffirm her people ' s position of neutrality before the Galactic Senate . Rex , Skywalker , Cody , and their clone squad met with Kenobi — who had been conducting an investigation into false rumors that Kryze had joined the Confederacy — at a spaceport in Mandalore ' s capital city , Sundari , where Kryze ' s starship , the " Coronet " , was preparing to depart . After checking in with Kenobi , Rex and his comrades joined Kryze and her entourage aboard the " Coronet " , which then left for Coruscant . En route to the Republic capital , Skywalker and Kenobi gathered their troops in the cargo hold for a briefing . The Jedi told the clones to stay vigilant for the Death Watch , which would stop at nothing to assassinate Kryze before she reached Coruscant . Rex and Cody sent their men to begin their rounds of the cargo bay , patrolling for any signs of danger , while Skywalker and Kenobi left to meet with Kryze . During their patrol , Rex and Cody bumped into R2 - D2 , who appeared to have been frightened by something . The two officers also found they were unable to make contact with two of their men , Mixer and Redeye . Rex contacted Kenobi , who sent Skywalker back to assist in investigating the disturbance . Bringing the rest of the squad with them , Rex and Cody followed Skywalker and R2 - D2 with headlamps ablaze through the labyrinth of containers in search of Mixer and Redeye . Their focus shifted upon finding an open and overturned crate , with Skywalker ordering Rex , Cody , and their men to find the box ' s missing contents . The disappeared cargo manifested itself as a large assassin probe droid , which had killed Mixer and Redeye and now began to attack Skywalker . Rex and his comrades intercepted the droid during its fight with Skywalker , disabling it with blasterfire before it could crush their Jedi General with its large legs . However , a second assassin probe took advantage of their distraction to head for the turbolift shaft leading to the dining room , where Kenobi was guarding Kryze and her Senatorial colleagues . Rex and the others ran for the lift but were unable to prevent the assassin probe from climbing up to the dining room ; Skywalker notified Kenobi of the impending danger via comlink . As Skywalker speculated on the possibility that more assassin droids were aboard , the fallen assassin probe hatched an army of tiny but deadly probe killer droids . Rex , Cody , and their men opened fire on the probe killers and , despite some casualties , managed to repel the majority of the nuisances . Although Rex wondered aloud how the assassin probe had gotten aboard the " Coronet " , Skywalker instead focused on the more specific question of who had smuggled it aboard to assassinate Kryze . After finding the protocol droid in charge of the cargo manifest , Skywalker ascertained that someone had used a Senate stamp to approve the shipment of the crates containing the assassin droids . Acting on that lead , Kenobi launched into an interrogation of the four senators aboard the " Coronet " — Onaconda Farr , Kin Robb , Orn Free Taa , and Tal Merrik — to determine which one of them had smuggled the droids aboard , while Rex and his men joined Skywalker in scouring the cargo hold for the third and final assassin probe . While patrolling with Rex , Cody stopped to examine a trooper ' s abandoned helmet and became the victim of a probe killer that had been hiding inside it . Cody fell to the floor as he tried to fight off the probe killer , and when Rex tried to grab the droid off his comrade , two more of them jumped onto the captain . Both officers were saved by the timely arrival of Skywalker and R2 - D2 , who disabled the enemy droids with lightsaber and electric shocker , respectively . Rex informed Skywalker that he still had not seen the remaining assassin probe , but a moment later , the droid jumped out from behind some nearby crates and bowled over the captain . With Rex taken by surprise , the assassin probe climbed on top of him and prepared to impale him with its front pincers . Recovering quickly , Rex grabbed the droid ' s legs and kicked his attacker off him before it could do any harm . He and Cody fired at the droid as it escaped up a wall , and though both of them landed hits , it was not until Skywalker threw his lightsaber at the droid and severed most of its legs that it toppled back to the floor . Running over , Rex slammed his foot down on the disabled probe and rained down blasterfire on its cranial unit , preventing it from releasing its probe killer spawn . A triad of Separatist " Droch " - class boarding ships — called in by Tal Merrik , whom Kenobi had exposed as the Death Watch agent — thereafter assaulted the " Coronet " , penetrating its hull to deploy a boarding party of super battle droids . Joining Skywalker in one of the hallways , Rex and Cody led their men in a firefight with the battle droids . Rex and the others were able to bring about the Separatists ' defeat and left the hallway littered with droid parts . The rest of the " Coronet " journey went uninterrupted , with Rex and his comrades safely transporting Kryze and her entourage to Coruscant . After they docked at a landing pad , Rex , Cody , and their men disembarked with Skywalker and Kenobi , their escort duty ending as a success . Mission to Taloraan . During an assault on Separatist - loyal Trade Federation forces over the Bothan colony world of Kothlis , Rex served as the gunner of Tano ' s BTL - B Y - wing starfighter . Each in their own starfighter , Skywalker , Tano , and Kenobi led the Republic ' s attack on the Vulture droids deployed from a Federation " Lucrehulk " - class Droid Control Ship . Upon reaching the battleship , Tano released a volley of proton torpedoes at the vessel ; Rex regarded the ship ' s subsequent destruction as a beautiful sight . The Separatist " Dreadnaught " - class heavy cruisers were forced to flee , securing the Republic ' s victory over Kothlis . Shortly thereafter , Rex accompanied Skywalker , Tano , and Kenobi to the planet Taloraan , where the Jedi were to undertake negotiations for Tibanna gas with the Denfrandi tribe , the dominant clan on the world . En route to Taloraan aboard the " Resolute " , Rex conferred with Tano on the prospect of the diplomacy that she would be engaging in over the next few days . Whereas Tano found diplomatic negotiations boring , Rex respected them as a different method of fighting , one for which he was not trained . While the three Jedi left for the capital , Taloraan City , in a " Nu " - class shuttle , Rex remained aboard the " Resolute " with Wullf Yularen to regularly check in with the Jedi . To contact the Jedi , the " Resolute " had to routinely leave orbit for a closer signal range . Unbeknownst to the Republic , Denfrandi Magister Orlin Denache had secretly forged an alliance with the Confederacy and was housing battle droids on Taloraan . During one of the " Resolute " regular trips into comm range , the Jedi — who had discovered the Separatist presence in Taloraan City — warned Yularen that the " Resolute " was heading into a trap : A Confederate " Munificent " - class frigate commanded by Captain Canteval was preparing to attack the cruiser . Yularen had his bridge crew raise the " Resolute " shields just in time to deflect fire from the enemy frigate . While the " Resolute " battled Canteval ' s battlecruiser , Yularen sent Rex and a clone trooper detachment to rescue the Jedi , whose shuttle had been destroyed . After landing with several LAAT / i gunships at a platform in Taloraan City , Rex and his men fell under fire from the Separatist - allied Denfrandi , who had taken up positions behind some cargo boxes . The brief firefight ceased when Denache ' s emissary , Sech Govlinder , galvanized the rest of the Denfrandi into taking up arms and defeating the Separatists . The Jedi established an accord to abate hostilities between the Denfrandi and their rival tribe , the Wind Raider s , thanks to Tano ' s personal involvement in the matter . When Rex asked Tano if she had changed her mind about her disregard for diplomacy , she replied that she had indeed due to her firsthand experience in the field . Defense of Kamino . The Republic discovered from an intercepted transmission between General Grievous and Asajj Ventress that Grievous was plotting to stage another invasion of Kamino , mere months after his last attempt had been thwarted at Rishi Station . Examining the message aboard the " Resolute " , where the 501st had been stationed , Rex , Skywalker , Kenobi , and Cody learned of Grievous ' s plan to cripple Kamino , a prospect that both Rex and Cody found quite personal . To notify Kamino of the impending threat and aid in the defense of the critical world , Skywalker and Kenobi set course for Kamino . En route , Rex met with his 501st troops in the " Resolute " hangar bay to inform them of their new assignment . He found Echo and Fives in the process of unloading supplies from a gunship and conferred with the new recruits , discovering that given their lengthy service since joining the 501st , they had expected that Cody would have already made them Advanced Recon Commandos . Partly as a rebuke for their restlessness , Rex told them they would earn such a promotion when they no longer had to ask for it . After transferring to an " Acclamator " - class transport , the Jedi and the 501st landed at the Military Complex of Kamino ' s capital , Tipoca City , where Rex , Skywalker , Kenobi , and Cody met with Jedi General Shaak Ti and Prime Minister Lama Su to relay the news of the Separatists ' plan . Though they quickly marshaled Kamino ' s defenses , it was not long before Grievous ' s fleet arrived to challenge the Republic ' s orbital blockade . While Skywalker and Admiral Yularen oversaw the space battle against Grievous ' s flotilla , Rex joined Cody , Kenobi , Ti , and Su in Tipoca City ' s command center to monitor their progress . However , as debris from the Separatist cruisers fell into Kamino ' s ocean , the space engagement proved to be a diversionary assault when the remains of the ships turned out to be disguised modules for " Trident " - class assault ships , which the Separatists secretly reassembled below sea level . Using the craft , Grievous and Ventress landed hundreds of droid troops in Tipoca City and rapidly beleaguered the vital cloning facilities . As the droids began to overrun the Military Complex , Rex and the others were joined by Skywalker , who returned to the war room to help organize the city ' s fortifications . Rex and his comrades agreed that the Separatists ' primary target would be the DNA archive — which was crucial for future clone production , as it stored the limited remainder of Jango Fett ' s DNA . While Skywalker and Kenobi headed off to guard the DNA archive chamber and oversee the main assault on the battle droids , respectively , Rex and Cody found Echo , Fives , and the maintenance clone 99 at the barracks with several young clone cadets , who had been separated from their group . Although the cadets did not believe they could be of help since they had not yet graduated from training , Fives and Echo rallied them to take up arms , underlining that it was their home that they were defending . With the droids nearing the barracks , Rex and Cody followed 99 to the nearby armory to retrieve weapons for the others so that they could stage a retaliatory assault . The cadets hid in the raised retractable sleeping chambers to provide extra firepower at the right moment . When a squad of B1 battle droids led by Grievous broke into the barracks , Rex , Cody , Echo , and Fives immediately gunned down the advance forces at the entrance , while Kenobi engaged Grievous in a lightsaber duel . However , Rex and his comrades could not eliminate all of the droids and retreated into the barracks , stampeding back along the main corridor with the droids in close pursuit . Rex quickly found cover behind several crates alongside Cody , Fives , and Echo to return the enemy fire . As the droids gained ground and pushed Echo , Fives , and Cody back toward Rex ' s position , 99 tossed Rex a thermal detonator , which he launched at the advancing droids . Yet he missed , instead hitting an adjacent crate . Once the battle droids had passed by the cadets ' hiding places , Rex commed the young trainees to open fire on the droids , which they did to great effect . As more droids fell in the ensuing crossfire , Cody used up the last of the thermal detonators . Though 99 opted to retrieve another supply of explosives from the armory , his decision to abandon his cover — despite protest from Rex and the others — cost him his life , as he took enemy fire to the back and died . Cody thereafter received word from Ti that the droids had been pushed back to the main hangar . The Republic forces soon secured a victory over the remaining Separatist forces , forcing Grievous and Ventress to retreat . However , the damage had been done : Rex , Cody , Fives , and Echo took some time to lament the loss of 99 , whom they believed had been a true soldier in spite of his debilitative cloning malformations . While clone troopers and Kaminoan cloners alike began to repair the desolation wrought throughout Tipoca City , Rex and Cody found Fives and Echo in the Military Complex ' s hangar and commended them on the true valor they had displayed during the battle . Once again impressed with their efforts , Rex and Cody officially promoted both 501st troopers — who had been only cadets not that long ago — to the prestigious rank of Advanced Recon Commando , saluting the Grand Army ' s newest ARC troopers . Later in the war , the Trade Federation blockaded Pantora , suspending all commerce with the system to pressure the Pantorans into an alliance with the Confederacy . While with Skywalker on Coruscant , Rex saw Padmé Amidala off from a landing pad as she was preparing to leave the capital aboard her J - type diplomatic barge . The three of them soon received news from Tano that Chi Eekway and Che Amanwe — the daughters of Chi Cho ' s successor , Chairman Notluwiski Papanoida — had been kidnapped . Skywalker sent his Padawan to aid Riyo Chuchi in investigating the matter , and Tano and Chuchi helped Papanoida rescue his daughters from the Separatists . They restored relations between Pantora and the Trade Federation , repealing the blockade . While on their way to rendezvous with Jedi General Kit Fisto , Rex and Skywalker made a brief stop on Mandalore . The reason for their visit was to drop off Tano , whom the Jedi High Council had delegated — at the request of Satine Kryze — to teach cadet classes at the Royal Academy of Government . Because the world had become engulfed in a black market crisis , Tano ' s involvement was intended to curb the planet ' s deeply rooted corruption among its future leaders . After arriving at the Sundari docks aboard an " Eta " - class shuttle , Rex and another trooper stood by while Kryze and her Prime Minister , Almec , welcomed Skywalker and Tano . With Fisto expecting them , Rex reminded Skywalker of their orders , and they soon left Mandalore to join up with Fisto . Meanwhile , Tano and her students found that Almec was behind the ongoing black market conspiracy and helped Kryze bring him to justice . Shortly after returning to Coruscant , Rex and Skywalker were given command of the Grand Army ' s Third Legion for another assignment . A large - scale civil war had consumed the planet Balith , and in response to an appeal for Republic aid , the Jedi Council tasked Rex and Skywalker with intervening in the fighting . While Tano stayed at the Jedi Temple to focus on her studies , Rex and troops from Torrent Company picked up Skywalker with a " Nu " - class attack shuttle , then boarded a waiting " Venator " - class Star Destroyer for the voyage to Balith . Bloodshed and rescues . When the " Resolute " was scheduled to undergo a refit , Rex and Torrent Company were transferred with Skywalker , Kenobi , Tano , and Yularen to the recently christened Star Destroyer " Indomitable " . Presently , the Jedi and their fleet — including the cruisers " Indomitable " , " Pioneer " , and " Coruscant Sky " — received intelligence from the Grand Army ' s Special Operations Brigade that General Grievous was planning on seizing Kothlis and its Bothan Spynet facility . While in " Indomitable " mess hall , Rex , Sergeant Coric , and trooper Checkers were joined by Tano , who reported that the fleet was heading to mount a defense of Kothlis . Rex learned from Tano that a ground assault on the planet was highly possible ; if the Separatists had already begun to invade Kothlis , Kenobi and Tano would be leading the counterattack on the surface while Skywalker commanded the space battle . The captain then put his men on standby and had them begin preparations for the imminent battle . When " Indomitable " , " Pioneer " , and " Coruscant Sky " arrived at Kothlis , they found that Grievous had already begun to beleaguer the undefended planet . The Jedi additionally discovered that Grievous was employing a computer virus to jam all of the Republic ' s comm channels , terminating ship - to - ship communications . Skywalker met with Rex , Tano , and their waiting men in their barracks and informed them of the Separatists ' comm jammer . Although Rex was concerned with the news , Skywalker stated it was possible that comms would be restored in time ; if necessary , reinforcements could be requested . Before proceeding to the gunship hangar with Tano and Torrent Company , Rex wished his general good hunting . Once Skywalker and his Gold Squadron pilots had initiated the space battle against Grievous , Rex and Tano were joined by Kenobi in their gunship and led the assault force ' s launch from the fleet . En route to the surface of Kothlis , Rex spared his men a few last - minute words for preparation . After landing , Kenobi ordered Rex and Tano into the fray while he led the assault on the Separatist - claimed Spynet facility . Rex , Tano , and Torrent Company engaged the entrenched droid infantry forces in the central plaza of Kothlis ' s capital , Tal ' cara , battling super battle droids , droidekas , and STAP - mounted droids . However , with only one gunship for air support , Torrent Company took heavy losses — their highest since the Battle of Teth . Rex was among the injured , taking wounds to his right arm and chest . Checkers , who was wounded less severely , stood with his captain , ready to support him if he needed it . After the fight against the droids in the plaza reached a temporary standstill , Tano ordered Rex and his men to fall back and tried to contact Yularen for assistance , but her attempt failed due to the Separatists ' still - active comm jammer . Seeing no other options , she left to get help from Kenobi while the barely conscious Rex stayed to watch over his men . Tano rendezvoused with Kenobi and assisted him in reclaiming the Spynet facility from the Confederacy , thanks in part to the efforts — and sacrifices — of Torrent Company and other clone units . The Republic fleet also managed to repel Grievous ' s forces from Kothlis . Rex , Coric , and the other wounded soldiers were sent for treatment at the Republic ' s Kaliida Shoals Medical Center , one of the Republic Sector Armies ' twenty " Haven " - class medical stations . Tano chose to be treated with them at the Outer Rim medcenter so that she could provide moral support . Although the Kaminoan doctors quickly healed Tano ' s injuries , Rex , Coric , and several others had to undergo bacta treatment and received their own bacta tanks . Rex and Coric were among those who made full recoveries , though the Kaminoans did not have as much success with some of the other troopers . Eventually , Rex , Coric , Checkers , and the other survivors were discharged and returned to Coruscant ' s GAR clone barracks on furlough to rest up before their next assignment . Tano arrived at their barracks an hour after their return to welcome them back . She revealed to Rex and Coric that she was concerned for her Master , whose life had been put into grave danger while on a confidential mission with Kenobi . Unable to rescue their generals for the time being , Rex and Coric tried to cheer up Tano with a game of turbo - dart s . Since they had not yet received their next orders , Rex only intended to take a few days of recuperation before resuming Torrent Company ' s training . Their next deployment came within a few days , a day after the Separatists launched a devastating bioweapon attack on the planet Chandrila . Although GAR command did not inform him of their destination , Rex learned about their complete assignment from Tano , who was to accompany them on their mission . Tano explained that Torrent Company was joining a battle group bound for the Separatist - occupied planet Lanteeb to rescue Skywalker and Kenobi , who had been trapped there by forces under the command of General Lok Durd — a recent escapee from Republic incarceration . Durd was manufacturing a damotite - based bioweapon on Lanteeb , which had been responsible for the massacre on Chandrila , and the Republic intended to eliminate the weapon ' s stockpiles before it could strike again . Admiral Yularen was given command of the armada bound for Lanteeb , and Rex , Tano , and Torrent Company joined him aboard " Indomitable " , which had undergone repairs following the recapture of Kothlis . Their three - cruiser battle group — again consisting of " Indomitable " , " Pioneer " , and " Coruscant Sky " — received the addition of Mace Windu ' s " Dagger " , which came from safeguarding Kothlis in the wake of the Separatist invasion . Upon reaching Lanteeb in the Malor - 77 system , the Republic forces found that not only were twenty - five enemy warships heavily blockading Lanteeb , but Grievous himself was leading the blockade . Among their scant good news was that Grievous ' s communications jammer virus had been temporarily nullified , restoring communications in the interim . After executing three starfighter assaults on Grievous ' s flotilla , Yularen ' s battle group received reinforcements in the form of a large volunteer civilian fleet , which Senators Padmé Amidala and Bail Prestor Organa had worked tirelessly to organize in the absence of further support from the Republic Navy . Rex and the 501st prepared to aid in rescuing Skywalker , Kenobi , and Jedi Master Taria Damsin , who had slipped through the blockade to help the trapped generals . With the aid of the civilian ships , Yularen ' s fleet scattered the blockade , forcing Grievous to retreat . While Yularen oversaw the battle group ' s efforts to liberate Lanteeb from Separatist control , Rex joined Windu and Tano in leading the 501st and another Grand Army unit , the 95th , to the Lanteeban city Torbel , where Skywalker , Kenobi , and Damsin were desperately defending the local populace from Durd ' s droid army . The 501st and 95th took a squadron of thirty gunships to Torbel , with clone trooper pilot Jinx transporting Rex and Tano . Once they arrived in Torbel , Rex , Coric , and Checkers joined their comrades in cutting through the battle droids ; the Separatist detachment was defeated in under an hour . As Windu coordinated the Republic ' s various mopping - up operations , the sun began to set on Lanteeb , so Rex arranged for the floodlighted gunships to be positioned around the village square for additional light . Since the battle had reduced Torbel to little more than ruins , the Republic granted the villagers refugee status , and Amidala and Queen Jamillia offered to give them homes on Naboo . While Windu stayed behind to discuss the civilians ' future with the village speaker , Rikkard , Rex and a clone medic escort shuttled Tano and the extremely injured Skywalker , Kenobi , and Damsin to " Indomitable " for proper medical treatment . Windu then took Skywalker , Kenobi , and Damsin back to Coruscant aboard " Dagger " , with Rex and Tano being entrusted with overseeing the remainder of the Republic ' s operations on Lanteeb with the 501st Legion . Wartime assignments . When a group of clone troopers , having just pilfered the coordinates for the Separatist hypermatter generator s , crashed on the Hutt Space world Asuin , Rex , Skywalker , and Kenobi were tasked with rescuing the clone squad before the Confederacy could recover the intelligence . After Rex pinpointed the location of the squad ' s escape pod on the surface via scanning , Skywalker and Kenobi moved in to secure the craft . While battling the Separatists , Rex made contact with his Jedi Generals and reported that battle droid reinforcements led by Asajj Ventress were heading for their position . Skywalker and Kenobi managed to rescue the sole surviving trooper of the crash , but Ventress then confronted them . Although she destroyed J - 3PO , the protocol droid containing the hypermatter generator coordinates , Skywalker and Kenobi were able to escape from the battlefield . Shortly after the planet Makem Te rejoined the Republic , the Separatists deployed an advanced tank known as the " Bogg Behemoth " on the world . The Jedi Council dispatched Rex , Skywalker , and Kenobi to combat the new threat . Taking a battle group of HAVw A6 Juggernaut tanks and a clone legion to Makem Te , Rex and his Jedi Generals found the " Bogg Behemoth " in the desert near the city Thousand Thousand . Even with commandos supporting their elite detachment , Rex voiced skepticism to Skywalker and Kenobi that they would be able to capture the " Bogg Behemoth " , as they had been ordered to do . Because intelligence alleged that the " Bogg Behemoth " was still undergoing final testing , Kenobi mobilized their forces in a preliminary strike before the tank came online . When Rex led his men against the " Bogg Behemoth " , their intelligence proved to be faulty — the tank , already functional , began to launch scores of missiles at the clone soldiers . Though Rex had the Republic ' s AV - 7 Antivehicle Cannons return fire at the " Bogg Behemoth " , the tank ' s shield and heavy armor afforded it sufficient protection to endure the thick bombardment . With their men taking losses , Skywalker and Kenobi elected to instead assault the " Bogg Behemoth " from above . Rex and the Jedi landed their troopers on the tank via LAAT / i gunships , but hundreds of DSD1 dwarf spider droids confronted them before they could secure the deck . As Rex and his soldiers held out against the dwarf spider droids , Skywalker and Kenobi infiltrated the tank and forced its Geonosian operator , Bogg , to deactivate the vehicle and its defenses . Despite the clones ' capture of the " Bogg Behemoth " , Kenobi chose to destroy it , as he simply did not believe that the Republic could adapt such destructive weapons for proper ethical use . On another occasion , Rex joined Kenobi , Cody , and a company from the 212th Attack Battalion to claim Bogoa , a world whose durable coral was coveted by the Confederacy for use as ship - building material . After battling the Separatists for three days , the Republic forces managed to compromise the enemy stranglehold . During the following interlude in fighting , Rex remained at the Republic ' s staging area with Kenobi and the 212th infantry while Cody embarked on roundup duty , searching for survivors amidst the carnage on the battlefield . Cody soon found the B1 battle droid Coppertop , whose battle protocols had been peculiarly overridden ; the droid had subsequently deserted the Separatist Droid Army to aid the wounded from both sides of the conflict . When Asajj Ventress and the bounty hunter Cyreltov attempted to reclaim Coppertop for Count Dooku , who had issued the experimental Order 99 directive that had modified Coppertop ' s objectives , Coppertop sacrificed himself to prevent Kenobi and Ventress from fighting over him . Ventress and Cyreltov thereafter retreated from Bogoa , having failed to retrieve Coppertop , while Kenobi and the clone troopers recovered from the battle . Rex joined Skywalker and Tano in contesting the Confederacy ' s claim to the jungle planet Zeenada , where a large Separatist invasion force soon outgunned them . In response , Skywalker had Rex and Tano take a squad around the battle droid lines and stage a diversionary assault on the enemy ' s rear position . Doing so would cause the Separatists to believe that the Republic ' s main force was behind them , allowing Skywalker to capture the droids in a pincer maneuver . While circling around the enemy infantry , Rex and Tano encountered a droid patrol . By the time the droids had been eliminated , only Rex , Tano , and two other troopers — Gunner and Sarge — remained of their squad . Rex advised that they abort the mission and return to Skywalker for reinforcements , but Tano reminded them that Skywalker was depending on them to fulfill their objective . When they came across a wild feline predator , Tano ordered Rex , Gunner , and Sarge to avoid firing at it unless absolutely necessary while she distracted the creature . Yet she was unable to defeat the predator , and when she felt the ground shaking underneath them , she quickly Force - pushed Rex and the others aside . The threat turned out to be an incoming pack of wild animals , but Rex and the others were able to avoid the stampede . Although Sarge and Gunner were skeptical of Tano ' s experience on the battlefield , Rex ordered them to respect her command , as she was in charge . They proceeded through the Zeenada jungle , eventually arriving at a swamp right behind the Separatists ' rear flank . Rex was not enthusiastic about having to trudge through the swamp , but Tano believed that they could cross it via several rocks running through the marsh . However , the rocks — which were actually reptilian eggs — turned out to be yet another example of Zeenada ' s native wildlife : They hatched into massive swamp beasts , whose parent proceeded to attack Tano . While Tano ordered Rex and his men to safety , she had the idea to lure the beast onto the battlefield to attack the battle droids . Her plan worked , and while Skywalker ordered his forces to assault the droids ' frontal flank , Rex , Gunner , and Sarge crossed the swamp and jumped into battle alongside Tano . When Republic Admiral Tenant and the crew of his Star Destroyer crew intercepted a message containing a 2 , 000 - year - old Jedi distress code , the Jedi High Council sent Skywalker , Tano , and Kenobi to investigate the location of its origin : the remote Chrelythiumn system , a site far beyond the Outer Rim Territories in the relatively unexplored region of the galaxy termed Wild Space . Since the Jedi Council suspected a Separatist scheme , Rex was dispatched aboard a heavily armed " Venator " - class Star Destroyer to meet up with the three Jedi at the source . Although both Rex ' s Star Destroyer and Skywalker ' s " Eta " - class shuttle arrived at the rendezvous point and established contact via the HoloNet , a peculiar situation arose : Neither Rex ' s cruiser nor the Jedi ' s shuttle were able to locate each other on their scanners . The peculiarity of the situation escalated when an outside source cut off Skywalker ' s holographic connection to the warship . While the concerned Rex continued his attempts to locate them , the Father — a powerful Force wielder who maintained the mysterious world known as Mortis — transported Skywalker , Tano , and Kenobi there . The Father wished to test Skywalker , who was believed to be the Chosen One of an ancient Jedi prophecy . After Skywalker , Tano , and Kenobi underwent a series of tribulations on Mortis , they awoke aboard their shuttle . Seeing their craft reappear on his scanners , Rex reestablished holographic contact with them , confirming that they were all right . Although Rex did not understand when Skywalker stated that their communications blackout had lasted for more than a moment , Skywalker , commenting that they could not explain their ordeal , brought in their shuttle to join Rex aboard his Star Destroyer . Infiltration of the Citadel . Following the Confederacy ' s capture of Jedi Master Even Piell , the Jedi Order sanctioned a mission to free the senior High Council member from incarceration in the Citadel , the most feared prison installation in the galaxy . Because Piell had just discovered the coordinates of the strategic Nexus Route , a secret hyperspace lane that spanned from Coruscant to the heart of Separatist space , his findings were of great value to both sides of the war . Rex was assigned to Skywalker and Kenobi ' s elite team to rescue Piell alongside Cody , Fives , Echo , and several other clone troopers . When Plo Koon headed a briefing on the mission at the Jedi Temple ' s communication center , Rex was present at the conference via hologram . The task ahead would become one of Rex ' s most difficult ones since the outset of the war : Because the Citadel had originally been designed to hold rogue Jedi who had fallen to the dark side of the Force , no team had ever been able to infiltrate the highly guarded prison . Although Rex was skeptical that the Separatists were still keeping Piell alive , the Jedi firmly believed that the Separatists would not kill Piell until they had extracted the Nexus Route coordinates , which were too valuable to waste . Once the Jedi had established a plan for infiltrating the Citadel on the planet Lola Sayu , Rex joined the others at a carbon - freezing chamber in the Jedi Temple Hangar , where they were to be encased in carbonite to circumvent the Citadel ' s life - form scanners . After the Republic engineer Erk Zallis froze them in carbonite , Rex and his comrades were ushered onto Shuttle 81572 , a captured Separatist Class Type B escort shuttle , which R2 - D2 and a squad of reprogrammed B1 battle droids would pilot to Lola Sayu . R2 - D2 ' s battle droids transported the infiltration team — including the unauthorized addition of Ahsoka Tano — to Lola Sayu , gaining clearance from Citadel Command to proceed to the prison . At a site amidst the Citadel ' s maintenance pipes , Rex and the others were unfrozen from the carbonite , taking some time to recover from the encasement process before heading out for the facility . In the meantime , R2 - D2 and his battle droids remained behind to guard the shuttle . Separated from the cliff - side entry point to the Citadel by a river of sulfurous lava , the squad was forced to ascend the cliff to the lookout balcony . However , strong winds hampered the use of jetpacks , and sensitive electro - mine s thwarted ascension cables , so the Jedi and clones resolved to free - climb the cliff . Rex and his companions braved the dangerous conditions and reached the lookout balcony , where Tano disabled the door ' s ray shield from the inside by slipping through a ventilation shaft . Just as Rex , Cody , and their men were joining Skywalker , Tano , and Kenobi on the balcony , trooper Charger lost his footing and fell down the cliff , activating an electro - mine and consequently being shocked to death . With alarms blaring and the Citadel ' s warden , Osi Sobeck , alerted to the Republic team ' s presence due to the tripped electro - mine , the Jedi and clones crept into the prison on the lookout for battle droid patrols . Avoiding droid guards and eliminating surveillance camera s along one of the hallways , the team cut through laser emplacements lining the walls . However , they soon discovered that the hallway was electrified when Sobeck remotely activated that trap . The others reached a safe passageway , but trooper Longshot was killed before he could make it to safety . After locating and breaking into Piell ' s holding cell with his comrades , Rex gunned down the A4 laboratory assistant droid that had been on the verge of gouging out Piell ' s sole remaining eye . Once Skywalker and Kenobi had freed him from his containment field , Piell revealed that he only possessed half of the Nexus Routes coordinates — the rest laid with his Republic Navy captain , Wilhuff Tarkin , who had committed them to memory and would also require rescuing , along with the clone trooper crew captured from Piell ' s flagship . En route to free Tarkin and the other officers , Rex and his comrades were intercepted and surrounded from both directions by a squad of the Citadel ' s elite BX - series droid commandos . Though Rex assisted Skywalker and Tano in eliminating the droids at their end , the entire team fell prey to the powerfully magnetized ceiling , which pilfered their weapons and held them out of reach some meters above them . As Kenobi , Tano , and Piell used the Force to hold droid commando reinforcements at bay , Skywalker , who had been pulled up to the ceiling because of his prosthetic hand , managed to reclaim his lightsaber and sliced through the magnet . Rex and his comrades quickly rearmed themselves and cut through the droids . Before continuing on with the others , Rex disabled the surveillance cameras in the area , through which Sobeck had been watching them . Once Tarkin and the clone officers had been liberated from their cell , the Jedi decided on a new plan to escape from the Citadel : While Kenobi and Piell took one group to create a diversion , another team led by Rex , Skywalker , Tano , and Tarkin would find an escape route from the fortress . An advantage of such a tactic was that Piell ' s and Tarkin ' s halves of the Nexus Route intelligence would remain separated should Sobeck recapture one of them . Using dated data from the Jedi Archives , Skywalker located a hallway adjacent to one of the Citadel ' s original fortress tunnels . He cut a hole through the wall with his lightsaber , and Rex and the others entered the tunnels , with Rex having Fives and Echo replace the severed hole behind them to avoid detection by Sobeck ' s pursuant forces . As they headed for the entrance to a pipeline network , Skywalker took up position at the rear to guard their flank from the droids sent to recapture them , while Tano led the group onward . Along the way , Rex defended Tano ' s abilities from Tarkin , who doubted that the young Padawan was capable of leading them to safety . After they found themselves at a dead end in the caverns , B2 super battle droids and droid commandos caught up with them , with the commandos sporting personal energy shields to counter the clone troopers ' blasters . While Rex , Skywalker , and their soldiers faced down the droids , Tano used thermal detonators that Rex had been carrying in a supply backpack to rupture the obstructive wall , saving two of the explosives to use on the shield - wielding droid commandos . Both the wall and the droids were blasted apart , allowing Rex and his comrades to travel on toward the pipeline . Rex and the others entered the large fuel line to ascend a ridge ; they were to meet R2 - D2 and their escape shuttle at the cliff ' s zenith . Due to the risk of igniting the flammable fuel within the pipe , Rex and the other troopers deactivated their lights and locked their weapons during their climb . Upon exiting the fuel line at the top of the cliff , Rex and his comrades were faced with a squad of B1 battle droids and LM - 432 crab droids . While Skywalker and Tano deflected the battle droids ' fire , Rex and Tarkin headed for cover with their men behind a series of nearby hills . After joining them , Skywalker used a thermal detonator from Rex to explode the section of the fuel line that they had just exited , leaving the droids in pieces . As Kenobi and the shuttle had not yet reached the pipeline , Rex and the others resorted to their backup plan — meeting Kenobi at his position instead . Rex helped one of Piell ' s injured clone officers to the Citadel ' s rear landing platform , where Kenobi , Piell , and their soldiers were battling Sobeck ' s forces to reclaim their shuttle , from which the droids had separated them . Rex , Skywalker , Tano , Tarkin , and their group joined Kenobi ' s squad at their cover behind several crates , but their refuge was compromised with the arrival of battle droids aboard STAPs , which soared in to attack them from behind . When Echo attempted to commandeer the shuttle , one of the platform ' s droid - manned blaster turrets blew apart the craft . The resulting explosion claimed Echo ' s life as well as the shuttle . Their only means of escaping off - world now gone with their comrade - in - arms , the Republic team was forced to retreat from the Citadel . Once Skywalker and Kenobi had requested retrieval from Koon and the High Council , Rex and his comrades proceeded away from the prison , across the perilous and barely navigable landscape of Lola Sayu . Rex , Cody , and Fives scouted ahead for the team as they traveled through a series of caves partitioned by rivers of sulfur . Taking advantage of the brief lack of pursuant droids , Piell contacted Yoda and Mace Windu at the Jedi Temple . With Koon ' s rescue fleet of cruisers already en route to Lola Sayu , Yoda and Windu informed Piell and the others that their rendezvous point with Koon ' s evacuation ships would be a small island in the middle of a lake of lava . When a trio of droid commandos caught up with them , Fives tossed a thermal detonator , making quick work of their pursuers . Yet Sobeck ' s forces did not relent in their pursuit and next tried to surround Rex and his comrades at a cliff , with battle droids approaching from the rear and a crab droid attacking from a nearby cliff face . While R2 - D2 ' s reprogrammed battle droids delayed Sobeck ' s forces , Rex and the others used ascension cables to descend the cliff ; Rex helped a clone officer down the ridge . Despite losing two troopers , they pressed on along a river of lava leading to the island rendezvous point . The group soon heard distant howling and realized that Sobeck had released a pack of hunters to lead his battle droids to them — specifically , the hunters were dangerous anooba trackers . As the anoobas were not far behind , the Jedi decided to use a nearby cave to their advantage : Once Skywalker and Kenobi had led the anoobas past the cave , Rex , Tano , Piell , and their men would surprise them and their accompanying battle droids from behind . After the anooba pack passed by , Rex and his team rushed to join Skywalker and Kenobi , but several crab droids intercepted them . While Tano and Piell held off the crab droids , Rex pushed on with Tarkin , Cody , and the clones to Skywalker ' s position , where they found him and Kenobi in battle with the anoobas and a squadron of STAPs . Although the anoobas and droids were defeated , the victory came at a high cost : Piell died in combat with the anoobas . Tano — to whom Piell , with his final breath , had designated his half of the Nexus Route coordinates — brought the body back to the others , who were saddened to learn of the Jedi Councilor ' s sacrifice . Even with Sobeck pursuing them , Rex and his comrades paused to honor the fallen Piell , cremating his body in the lava of Lola Sayu . Once Piell had joined with the landscape , the Republic team continued on to the island . With sulfurous lava separating them from the island , Skywalker and Cody each connected a cable to the opposite shore , erecting a line across the magma , and Rex and Tarkin were the first to climb across . As the others traversed the cables , Sobeck personally arrived with a squad of STAP - mounted droid commandos to reclaim his prisoners . A fierce lightfight ensued , with Rex and his men battling Sobeck ' s forces in a final stand . Unwilling to let the Nexus Route coordinates reach the Republic , Sobeck tried to murder Tarkin , but Tano killed the warden before he could do so . Just as Koon and Clone Commander CC - 3636 , nicknamed " Wolffe , " arrived aboard a gunship to rescue the Republic team , hordes of crab droids appeared and surrounded the Jedi and clones . After providing cover fire for the Jedi , Rex and his men boarded Koon ' s space gunship and lifted off from Lola Sayu . They and their starfighter escort — provided by Adi Gallia , Saesee Tiin , and Kit Fisto — reached Koon ' s fleet of Star Destroyers , which withdrew to hyperspace . Rex and the other survivors of the Citadel mission returned to Coruscant with Koon ' s fleet . During debriefing , the Jedi High Council encountered problems with processing the Nexus Route intelligence , as Tarkin had been instructed to take his half of the information directly to the Supreme Chancellor , while Tano , obeying Piell ' s dying wishes , intended to see that it was entrusted to the High Council . To resolve the matter , Yoda entered into discussions with Palpatine to determine the best way to debrief the information for Republic use . An escalating war . On the front lines of battle . Having become a foothold of Separatist strength since the onset of the Clone Wars , Felucia was engulfed in conflict for a second time on account of being situated near the valuable hyperlane known as the Perlemian Trade Route . Rex went with Skywalker and Tano to repel the Confederacy from Felucia , leading a clone trooper division of AT - TE walkers into the heart of enemy territory . They encountered squads of battle droids as they went but gained much ground , eventually joining forces with Plo Koon and Commander Wolffe to capture a Confederate outpost , to which General Grievous was sending reinforcements to fortify his hold on the system . As night fell , the Jedi and clones moved their forces to a ridge overlooking the outpost just as a C - 9979 landing craft arrived with the droid reinforcements . Koon decided on a three - pronged assault plan to secure the outpost : While Koon and Wolffe attacked the base ' s left flank , Tano would breach the rear entrance with troops from Wolffe ' s Wolfpack , a squad within the Grand Army ' s 104th Battalion . Meanwhile , Rex and Skywalker would spearhead the frontal assault on the station . Once Skywalker ' s Felucian scouts had found them a secure way to the path leading to the outpost , Rex positioned half of their soldiers amidst the dense foliage on one side of the path , while Skywalker did the same along the other side . With all of their forces in place , Koon had their AT - TE walkers deliver long - range fire at the outpost from the ridge . The cannonades baited tactical droid commander TZ - 33 ' s droid defenders out of the front entrance , and Rex and Skywalker began their attack once several DSD1 dwarf spider droids had been lured out into the jungle . Rex and Skywalker cut through the battle droids and joined Koon in capturing the base ' s command center , eliminating TZ - 33 . Although the enemy station had been secured , Tano was nowhere to be found — unbeknownst to her comrades , Trandoshan hunters had captured her for a ritualistic hunt on the moon Wasskah . Rex and his team received orders to return to Coruscant the next morning . As they prepared to leave Felucia , Skywalker had Rex and his men search the conquered outpost and the surrounding area for Tano several times , to no avail . With gunships waiting for them , Skywalker was forced to call off the search , hoping that Republic forces or spies in the Confederacy would locate his Padawan . Tano was later rescued from Wasskah and safely returned to the Jedi Temple . Following the Second Battle of Felucia , Grievous oversaw a Separatist invasion of the Calamari system , home to the Mon Calamari shipbuilders who were key to the Republic war effort . After the King of Mon Cala , Yos Kolina , was assassinated , Skywalker and Padmé Amidala were sent to quell the political tensions between the Mon Calamari and the Quarren in the wake of his death , hoping to stem the impending threat of a Mon Calamari – Quarren civil war . Despite their best efforts to peacefully resolve the conflict , Skywalker and Amidala were unable to stop the Quarren from seceding from the Republic in favor of an alliance with Commander Riff Tamson of the Confederacy . Upon learning that civil war on Mon Cala was now inevitable and imminent , the Jedi High Council immediately commissioned a company of clone troopers for underwater combat to prevent the world from falling to Separatist control . Rex , Tano , and Kit Fisto were appointed to oversee the reinforcements for the Mon Calamari . Yet the battle began before they could arrive when Tamson and Quarren chieftain Nossor Ri led an assault on the undersea capital , Mon Calamari City , where Captain Gial Ackbar of the Mon Calamari Guard was hosting Skywalker and Amidala . After arriving in the Calamari system aboard a " Venator " - class Star Destroyer , Rex remained on the bridge to supervise the clone detachment ' s deployment into the Calamari Sea . LAAT / i gunships took Tano , Fisto , Clone Commander Monnk , and their clone SCUBA troopers , all outfitted in submersible gear , to sea level , where they dove into the waters of Mon Cala . Using OMS Devilfish sub s to reach Mon Calamari City , Tano , Fisto , and their men joined Skywalker , Amidala , Ackbar , and Kolina ' s son , Prince Lee - Char , in the ongoing battle against the allied forces of the Separatists and Quarren . Thanks to further reinforcements from Naboo ' s Gungan Grand Army , the Jedi and clones bested Tamson ' s forces , with Nossor Ri and the Quarren realigning with the Mon Calamari and the Republic under newly appointed King Lee - Char . As the war progressed , Rex made the jump from the old Phase I armor to the more advanced Phase II equipment . Despite not being partial to the new gear , he developed a unique personal suit of Phase II armor , integrating the advanced equipment with salvaged Phase I parts . His troops in the 501st Legion and Torrent Company also adopted Phase II armor , carrying over their famous blue - marked design . Campaign on Ereesus . Rex and Sergeant Coric were dispatched to review security on the agriworld Biitu , where the Biituian s were repurposing Separatist battle droid scrap as raw materials to be sold to the Republic Senate . Rex and Coric brought along a detachment from Torrent Company aboard an LAAT / i gunship to the Pitor Processing Plantworks , where a disturbance had been reported , though GAR command did not provide specifics . As they approached the Plantworks , Coric voiced his disregard for war profiteers like the Biituians , though Rex admonished him for his disrespectful attitude . Upon landing , they were greeted by Pitor , the foreman in charge of operations . Pitor brushed off the report of a " disturbance " and took the opportunity to give Rex and his squad a tour of the large facility , which , being the largest of its kind in the Outer Rim , received huge quantities of dismembered battle droids by the day . When Rex questioned Pitor as to why his men ' s presence had been requested , Pitor revealed that a battle droid calling itself the Reanimator , having forged himself from the bodies of his fallen comrades , had begun to bring the scrap droids back to life . Although Rex and Coric initially had trouble believing Pitor ' s tale , the Reanimator — an IG - 100 MagnaGuard with a faulty neural processor — attacked Torrent Company at that moment , forcing them to take cover . While Pitor barricaded himself in his office , Rex ' s men fell one by one to the Reanimator and his droid army until only Rex , Coric , and a third trooper remained . Rex ordered a retreat so that they could find one of the Reanimator ' s weaknesses and exploit it . He and Coric helped their injured comrade to Pitor ' s office , where Coric forced Pitor to let them inside . As the enemy droids closed in , Rex devised a plan that would combine Pitor ' s skills with Coric ' s suicidal sense of duty . Proceeding to the roof , Rex and Pitor manned magnetic grapples that would allow Coric to pose as a clone trooper with Force powers . When the Reanimator arrived with his droids , Rex ' s ruse distracted the Reanimator long enough for Coric to place a blaster shot through the droid ' s head . The clone soldiers remained at the Plantworks for another day to eliminate the rest of the droids . Their report of the incident resulted in the Senate agreeing to implement stringent checks on all Biitu - bound salvage shipments to prevent further complications , as deliveries of still - operable battle droids had been the agent of the catastrophe . Rex , Coric , and their men received Pitor ' s thanks before departing . As they lifted off , Coric commented to Rex that despite his still - low opinion of profiteers like Pitor , he had learned that the only reliable battle droid was a properly recycled one . On another assignment without Skywalker , Rex and Torrent Company traveled to the planet Ereesus in the Outer Rim , where they entered into a collaboration with the local Ereesus Planetary Security Forces to repel a Confederate invasion . After establishing a forward operating base , Rex and his soldiers initiated an assault on the droid battle group , which was being overseen by a number of T - series tactical droids . The Republic ' s campaign soon took a turn for the worst , as the Separatists captured a squad led by Planetary Security Forces Sergeant Palola — along with their Torrent Company liaison , Oz — while gaining substantial ground , threatening to collapse the 501st Legion ' s left flank . The same night , Rex and his men learned of the Separatists ' demands for the hostage militia men via a two - minute holographic transmission from the tactical droid who had seized the squad . Adding to Rex ' s growing headache were numerous rebukes from generals in Sector Command concerning the fragile and crumbling situation . Rex was soon sought out at the forward base by Lieutenant Sollaw ap - Orwien and Corporal Dafyd , the former of whom asked to view the holorecording of the captive squad to see what Palola had said . Rex mistook ap - Orwien ' s entreaty for a misconceived notion , as the tactical droid had not allowed Palola to utter a single word during the transmission , but ap - Orwien insisted that due to being a Lorrdian like Palola , he could discern a message . As Rex brought ap - Orwien and Dafyd to the operations room , the former explained that during the Kanz Disorders of millennia prior , the Argazdan Myrialites had enslaved the Lorrdians and barred them from speaking . To the stupefaction of Rex and troopers Jesse and Ringo , ap - Orwien — instantly after taking his eyes off the transmission — relayed key intelligence from Palola . The Lorrdian sergeant , Oz , and their five comrades were being held in a depot at the top of the Hidaci Ridge ; the tactical droid ' s base of operations was a granary halfway up ; and the Separatists had stockpiled fuel and artillery on the road along the ridge . Ap - Orwien continued his explanation of the kinetic communication that the Lorrdians had developed during the Kanz Disorders , which had allowed them to communicate via the most minuscule movements and gestures ever since . As an example , ap - Orwien left the room , with Dafyd listening in as Rex relayed some made - up tactical information to Jesse and Ringo . They were further impressed when ap - Orwien reentered and , after exchanging wordless kinetic communication with Dafyd that almost missed Rex ' s scrutiny , repeated the fictitious orders word - for - word . After confirming with Sector Command , Rex devised a strategy to rescue Palola ' s squad from the Hidaci Ridge depot . To divert the Separatists ' attention , he dispatched a squadron of BTL - B Y - wing starfighters to launch a bombing run on the fuel and artillery dumps . A sham 501st advance would further draw the battle droids south and allow the extraction team ' s gunship to move in on the hostage site from the north . Rex selected Jesse , Ringo , and Dogma , one of their recent recruits , to accompany himself , ap - Orwien , and Dafyd on the team , with Kix serving as their medic . Rex set the plan into motion that night , deploying the starfighters to deliver their ordnance while he departed with ap - Orwien , Dafyd , and the others on a stealth - outfitted gunship . By the light of Ereesus ' s moon , Rex and his comrades flew to the Hidaci Ridge and lowered cables to the surface , fast - roping from the gunship into the depot . They landed at a speeder truck loading dock , where Rex and his soldiers switched on their night vision filters while the Lorrdian militiamen strapped night vision goggles over their eyes . Once they scanned the yard for hostiles , the team used explosives to blow open the main door and proceeded into the depot . Jesse and Ringo set a second set of charges to breach another door in the facility ' s office , which led downstairs to where Palola had reported that he and the other captives were being held . Immediately after the explosives did their work , Rex had Dogma toss an EMP grenade down the stairwell leading into the basement to deactivate the droid forces within . Following Jesse and Ringo into the basement , Rex placed a blaster bolt through the head of a still - twitching battle droid . However , as the troopers and militiamen discovered , Dogma ' s electromagnetic pulse had not disabled all of the droids . While Rex and the others deactivated their night vision filters , Jesse yelled out from further down the stairs that there were still - active droid commandos . Rex rushed down the stairs in an attempt to spot the enemy droids , but in doing so , he narrowly avoided a commando that detached itself from the pipes on the ceiling and brought its vibrosword through where his head had been a moment prior . The droid commando landed behind Rex and kicked him down the stairwell , then pinned him chest - down on the ground — resulting in a bloody mouth on his part , with his hands and blaster pistols trapped beneath him . Ap - Orwien came to his aid , decapitating the commando with a blaster bolt and allowing Rex to free himself from under the now - defunct droid ' s body . With the rest of the droid commandos disabled , Rex and his team headed for the locked door at the bottom of the stairwell . He had explosive charges placed to blow open the door , with Dogma again tossing an EMP grenade through the rupture . On the other side , Rex smartly gunned down a droid commando that tried to pounce on them from the ceiling . He and his comrades were relieved to find Palola , Oz , and the other five hostages safe with minimal injuries . Although Rex was about to radio the gunship for an immediate retrieval , he instead decided to act on Palola ' s findings , confirming from the Lorrdian that their tactical droid captor was headquartered in the nearby granary . Rex led his team and the former hostages to the granary , where they raided the droid encampment and captured the tactical droid ' s cranial unit . He and the others then returned to Torrent Company ' s base . When ap - Orwien asked if he and his fellow militiamen could spend the night at the 501st ' s base , since it was too late for them to return to their own headquarters , Rex told them it would be an honor to have them bunk with Torrent Company . Still , he smiled and declined ap - Orwien ' s offer for a game of sabacc , not willing to gamble with such masters of nonverbal communication as the Lorrdians . The shadows of Umbara . In late 21 BBY , a major point of contention in the war became the planet Umbara , whose Umbaran people had recently seceded from the Republic and were arming the Confederacy with their extremely advanced military weaponry . The Republic responded to Umbara ' s defection by sending a full invasion force from the Grand Army to conquer the strategic Umbara system , which was located in the Expansion Region ' s remote Ghost Nebula . As part of the numerous units dispatched to Umbara , Rex and the 501st Legion joined Skywalker and Kenobi aboard one of the Republic fleet ' s lead " Acclamator " - class transports . After Tano and Barriss Offee breached the Separatist blockade of Umbara , Skywalker and Kenobi ' s assault ship moved in on the Shadow World , so named because the Ghost Nebula eternally shrouded it in night . While their troops prepared to land on Umbara , Skywalker and Kenobi held a briefing in the hangar bay with Rex , Cody , and other troopers to outline the plan for capturing the capital city . Jedi Generals Saesee Tiin and Pong Krell would be supporting Kenobi and Cody ' s battle group in their attack on the Umbaran capital from the south , while Rex , Skywalker , and the 501st Legion were tasked with intercepting enemy reinforcements to the north of the city . Opposing the Republic forces would be the heavily armed Umbaran Soldier s of the Umbaran militia . Rex was pleased to learn that he and Skywalker would be assisted by an old friend , Advanced Recon Commando Fives , who was on special assignment to the 501st for the campaign . Once all of the Republic forces were ready for deployment , the Jedi and clones began their landing , taking space gunships to the planetary surface . Lieutenant Hawk piloted Rex , Skywalker , Fives , and some of the 501st troops — including veterans Hardcase and Jesse and new generation recruits Dogma and CT - 5385 , nicknamed " Tup " — through the atmosphere ' s thick fog , with clone Z - 95 starfighters providing support against enemy Umbaran starfighters . When the gunships were met with dense surface cannon - fire from the Umbaran militia , Hawk struggled to reach the predetermined landing site through the difficult conditions . After All Terrain Recon Transports and 501st AT - RT driver s were deployed to secure the landing zone against approaching Umbaran Soldiers and Umbaran hover tanks , Hawk brought Rex , Skywalker , and their men to the drop site , where they joined the battle and led the 501st Legion ' s charge on the Umbaran lines . During their advance , Rex took notice of a nearby ridge , which Skywalker elected to claim for use as a staging area . The Umbarans and their hover tanks were relentless in defending their positions , and Umbaran starfighters proved an even greater danger , executing strafing runs on the 501st troops . Even with the added threat of an esurient vixus creature , Rex and his men prevailed , taking the ridge and converting it into a temporary post . While monitoring the ongoing battle ' s progress from the trenches along the ridge , Skywalker noted that Kenobi ' s battalion was nearing the capital . However , the interlude in fighting did not last long , as Umbaran Soldiers had infiltrated the thick foliage behind the 501st lines to catch them off - guard . One of the enemy soldiers released a small but lethal millicreep droid , and the Umbarans took advantage of the clones ' following distraction to ambush them . In the ensuing engagement , Skywalker cut through the millicreep , while Rex called in an airstrike on the enemy ' s position . Seeing an opening to the south of the ridge , Rex advised that they move their men off the ridge in case the airstrike overshot , and Skywalker heeded his captain ' s advice . While Skywalker defended their flank , Rex led the 501st platoons out of the trenches to take cover amidst the scattered vegetation just below the hill . They were glad that they had done so , for a pair of BTL - B Y - wing starfighters arrived only moments later . Led by clone trooper pilot Odd Ball , who had been spared from General Krell ' s assault , the Y - wing bombers dropped munitions on the ridge , eliminating all of the Umbarans there . Shortly thereafter , Krell himself landed at Skywalker ' s position aboard a gunship to deliver new orders : In response to a request from Supreme Chancellor Palpatine , the Jedi High Council had ordered Skywalker back to Coruscant without delay . In the interim , Krell would assume command of the 501st Legion for the campaign on Umbara . Skywalker was concerned about leaving his troops in the middle of the battle , but Rex assured him that they would have the Umbaran capital under Republic control by the time he returned . Before departing aboard the gunship that had dropped off Krell , Skywalker introduced Rex to Krell , speaking highly of his captain . Although Rex told Krell that it was an honor to serve with him , as the Jedi Master had amassed an impressive record of victories throughout the war , Krell — a hard leader who strictly observed protocol — dismissed his words as mere flattery and made it clear that his command style was of a much different temperament than that of Skywalker . Despite recognizing that Krell would be difficult to work with , Rex readied his men to move out with their new general for the capital . While on an overland march through the hills , Rex and his men were attacked by a trio of flying banshees and raised their blasters in defense . They were unable to kill the banshees , which each grabbed a trooper and carried them into the air ; only Krell ' s intervention stopped the creatures ' rampage and saved their clone victims . Krell did not sympathize with the troops ' plight and briskly led them onward . Rex and his men trekked across the rough terrain for twelve hours straight , with Kix , the unit medic , soon voicing concerns for the soldiers ' increasing fatigue . Although Rex suggested to Krell that they make camp on a nearby ridge , Krell asserted the necessity of taking the capital as swiftly as possible — to him , the clones ' comfort was not as important as completing their mission , since the other Republic battalions were relying on their success . They eventually reached the main road leading to the capital , at which point Rex and Krell met to resolve their plan of attack . Rather than utilizing Skywalker ' s original plan for a myriad of surgical strikes , Krell opted to pit the entirety of the 501st platoons against the city ' s defenses in a full frontal assault — a plan that Rex saw as misguided , as it would surely engender high casualties . Despite Rex ' s concerns that they did not know the extent of the Umbaran defenses , Krell refused to let his orders be questioned and directed the captain to lead the 501st toward the capital , explicitly instructing him to continue marching regardless of Umbaran resistance . Rex reluctantly obeyed Krell ' s command and led the 501st platoons and AT - RT walkers on the route to the city , while Krell remained behind to command them from a distance . Tup and Fives saw the plan as reckless , but though Rex acknowledged that he , too , disagreed with Krell ' s strategy , he focused his men on staying alert on the battlefield . They soon encountered mines that had been planted along the road , and Ringo and Oz died in the detonations . While everyone else laid low , Rex had Fives execute a sensor sweep of the road ahead to root out any more waiting mines . There were indeed more explosives , and Rex and his men were careful to avoid setting them off . However , Umbaran Soldiers subsequently ambushed them from the surrounding forest . In spite of lacking cover from the Umbarans , Rex ordered his men to maintain their position on the road . He took out several Umbarans himself , but the 501st ' s casualties mounted as the enemy advanced on them , attacking from all sides . With his men surrounded , Rex ordered a retreat so that they could draw the Umbarans out of the darkened jungle . Although the 501st ' s rear flank endured heavy losses , Rex ' s plan worked , and his platoons were able to return many of the casualties to the Umbarans , forcing them to abandon their pursuit . Immediately thereafter , Rex was confronted by a greatly displeased Krell , who was outraged that the captain ' s retreat had ceded control of the road to the Umbarans . Fives protested to Krell ' s accusations , only to have his defiance silenced when Krell ignited one of his lightsabers and ordered him to stand down . Yet Rex stood his ground , stating that he had followed Krell ' s orders and , as a result , had lost many men , whose well - being it was his duty to defend . Noting Rex ' s opinion , Krell acquiesced , deactivating his lightsaber and dismissing him , though Rex and Fives were unable to ascertain if the general ' s words had been meant as a compliment . The Umbarans had meanwhile regrouped and resumed their assault , and Rex mobilized his men to defend their position . Upon entering the jungle to combat the Umbarans , Rex and the 501st Legion were faced with the further threat of Umbaran starfighters , whose ray shields effectively repelled their blasterfire . One of the starfighters moved in low to strafe them , and Rex and his men were unable to shoot it down before it pulled out of the vegetation . Rex elected to press toward the Umbaran lines before more starfighters could assail them . When Kix called for support to save some of the wounded , Rex led his men forward to cover Kix ' s position , having Jesse protect their right flank and Dogma their left . Kix rescued several of the fallen troopers and administered temporary stimulant s until they could receive proper medical treatment . In the midst of the fighting , Krell received word that Kenobi was unable to secure the capital due to its overpowering defenses , which were being resupplied by an Umbaran airbase to the west of the city . Before his battalion could advance on the capital , Kenobi required the 501st to capture the airbase so that the city ' s supply lines would be severed . Krell obliged , and Rex and his men set off with their general for the airbase , stopping when they reached a steep cliff overlooking the ravine that led to the enemy encampment . Rex examined the Umbaran defenses with a set of electrobinoculars and observed that the base was heavily guarded , with at least three tank divisions and a plethora of cannon installments contributing to its fortifications . Krell decided that they would besiege the airbase in another full forward assault , as they had without success against the capital ' s defenses . As Rex pointed out , the narrow ravine would force them into single squads , which would make them easy targets for enemy fire . Although Rex recommended that they look for a more secure route , Krell decreed that they did not have time to do so because Kenobi was urgently depending on their success . Despite again disagreeing , Rex heeded his orders . While 501st Sergeant CC - 1119 , nicknamed " Appo , " remained with Krell , Rex gathered his men at the bottom of the cliff and organized them into two divisions , one that he would personally lead and another that Fives and Hardcase would oversee . Many of the troops — including Jesse , Kix , Tup , and Fives — objected to Krell ' s tactics , and though Rex tried to defend Krell ' s recklessness by citing Skywalker ' s similar traits , Fives remained opposed to their interim general ' s decisions . Taking Fives aside , Rex tried to convince his comrade to ease the others ' minds . When Fives argued that Krell ' s plan was too costly and not worth following , Rex reminded him that their duty was to follow orders , even if that meant sacrificing their lives for victory . Rex led his men into the canyon and , after stopping to survey the airbase ' s defenses one last time with Hardcase and Fives , split the 501st squads into the two groups . While Rex and his team marched along the outskirts of the canyon , Fives took his division through the other side of the gorge . Fives ' detachment was the first to meet Umbaran resistance in the form of an Impeding Assault Tank , a deadly crawler tank that burrowed out of the ground to ambush them . As several of the ray - shielded tanks surrounded them , Fives requested rocket launcher support from Rex , who sent one of his men forward with an RPS - 6 launcher . When another Impeding Assault Tank injured that soldier , Kix tended to the fallen trooper while Hardcase took up the rocket launcher . By firing a missile directly into the cockpit of one of the tanks , Hardcase set off a chain reaction that blew apart the vehicle . However , with four more Impending Assault Tanks still operational , Rex ordered his men to regroup and take cover from the mechanical monstrosities . With only a few seconds ' lead over the tanks , Rex had his troops plant thermal detonators along the ravine corridor through which the tanks were advancing . The soldiers then retreated into the bottleneck , luring the crawlers into the booby - trapped passage . Once the tanks had fallen into their trap , Rex detonated the explosives , and he was blown into the air from the resulting blast , which consumed the four tanks . He and his men continued on in a single group , making their way through the seared wreckage of the tanks , one of which was still active . At Rex ' s word , Hardcase blasted its cockpit apart with a missile , and Rex made quick work of its Umbaran pilot . The clones also cut through several banshees that had been picking at some of their slain comrades , though Rex had to order Kix to leave behind the fallen and move on . As they neared the airbase , Rex and his men halted when they felt the ground shudder from doubtlessly more Umbaran forces . Sure enough , when Rex surveyed the area ahead with electrobinoculars , he saw that a far more deadly threat had been unleashed upon them : titanic six - legged juggernauts known as Umbaran mobile heavy cannons , each fitted with a powerful electromagnetic plasma cannon . He hurriedly ordered his men to fall back as the mobile heavy cannons opened fire , but the 501st platoons suffered severe casualties . Despite soliciting reinforcements from Krell , Rex was told that the rest of the 501st was guarding the entrance to the gorge so that his men could press forward to the airbase . Forced to obey Krell ' s direct order to stand his ground against the cannons , Rex mobilized his men , directing Kix to keep the wounded as quiet as possible . Although Fives and Jesse objected to Krell ' s head - on plan , neither of them had any ideas for an alternative strategy , so they fell in line with Rex in spite of their misgivings . Their RPS - 6 launchers proved ineffective against the mobile cannons ' armor , and the 501st troops continued to endure egregious losses . In the tumult , Kix called out for help with getting the wounded to safety , and Rex helped him carry one of the injured troopers to cover in nearby vegetation . When Kix made to rescue more of the wounded and resented Rex ' s orders for the contrary , Rex told Kix that he needed to survive the current crisis to be able to administer aid later . Although Tup was losing hope that they would be able to hold out , Rex , surveying the airbase once more , had an idea about how to destroy the juggernauts . He sent Fives and Hardcase to commandeer two of the base ' s Umbaran starfighters , which would provide some much - needed air support . Krell was infuriated when he learned of Rex ' s alternative plan and ordered him to continue his frontal strike under threat of being relieved of duty . Rex did so with the intention of distracting the Umbarans long enough for Fives and Hardcase to complete their stealth incursion , placing his trust in them . Rex took up an RPS - 6 rocket launcher and used it against one of the tanks , to no avail . He narrowly avoided being crushed and managed to disable one juggernaut ' s plasma cannon with a rocket , which prompted the Umbaran pilot to advance his vehicle on Rex ' s position . The return of Hardcase and Fives aboard their pilfered starfighters saved him from the tank , their artillery succeeding where the rocket launchers had failed . Hardcase and Fives ' success with eliminating the mobile heavy cannons elicited cheers from Rex and his comrades on the ground . With the juggernauts destroyed , Krell sent Appo forward with the rest of the 501st Legion to capture the airbase , where the Umbarans were using four more juggernauts to beleaguer the Republic fleet in orbit . After setting up an outpost to the south of the airfield , Rex had the 501st move in . With the aid of a Jedi Knight , they eradicated the airfield ' s mobile heavy cannons along with its supply lines to the capital . The Umbaran Soldiers at the base were taken prisoner and were locked in the prison levels . While reporting their hard - won success to Krell , Rex recalled that many men had died to take the enemy facility , to which Krell dismissed the captain as myopic , replying that he had yet to understand the price of victory . None of his comrades approved of Krell ' s sentiment , and as the general walked away , Rex agreed with Fives that it was Krell who would never comprehend the depth of the clone troopers ' sacrifices . Against General Krell . The 501st Legion established a staging area at the Umbaran airbase , making use of its barracks and attempting to crack the Umbaran starfighter access codes so that they could be converted for Republic use . However , the capture of the base had come at high casualties , further sowing mistrust with Krell ' s leadership within the 501st ranks . Furthermore , Rex and Krell soon discovered from Kenobi that the seizure of the airbase had not , ultimately , severed the capital ' s supply lines as they had hoped . Holographically conferring with Kenobi at the airbase ' s command center , Rex and Krell learned that the Umbarans had begun to receive arms shipments from a Separatist supply ship in orbit . With that new source , the Umbarans were continuing long - range missile attacks on Kenobi ' s position , preventing him from reaching the capital . When Rex inquired after the possibility of destroying the orbital supply ship , Kenobi stated that they had been unable to do so thus far due to the Separatist fleet ' s greater strength , leading Krell to resolve to take the capital regardless of the threat of the missiles . Before Kenobi could respond , the connection was severed due to enemy interference . Proceeding to ground level , Krell ordered that the 501st Legion be ready to move out in twelve hours for an assault on the capital , ignoring Rex ' s concerns that they should coordinate their attack with Kenobi ' s battalion even as the Umbaran missile strikes targeted an area adjacent to the airbase . Rex joined his men in Hangar 9 - 4 , where the clones were working to break the starfighter access codes . Upon learning of Krell ' s decision to continue the push toward the capital , Fives , Jesse , and Tup were disgusted with their general ' s head - on tactics . Rex did not agree with Krell ' s plan either but could not think of a better option to suggest to him . Fives solved that dilemma when he revealed that Jesse had cracked the starfighter access codes — they now had the ability to infiltrate the Separatist blockade as friendlies and eliminate the supply ship . Rex took Fives ' proposal to Krell , who — obstinate as ever — dismissed it out of a lack of faith in the clone troopers ' ability to pilot the alien - designed starfighters , in spite of Rex ' s belief in his men ' s faculty for adaptivity . When Rex broke the news to Hardcase , Tup , Jesse , and Fives in the barracks , Fives proposed that they carry on with their illegal plan and accept the consequences , which would , at the very least , involve being court - martialed . Although he stated that he would have given the strategy his support if they had more time and training , Rex resolved that they lacked both . He continued to argue with Fives outside of the barracks , seeing his comrade ' s intention to disobey orders as bereft of honor . Unable to convince Rex that Krell ' s orders were not worth following , Fives stubbornly left to round up some volunteers for the mission . He recruited Jesse and Hardcase as pilots for the Umbaran starfighters , but they drew Krell ' s attention when Hardcase accidentally liquidated the door of Hangar 9 - 4 while test - piloting one of the starfighters . Although Fives and Hardcase managed to convince Krell that the incident was a result of an enemy booby trap encoded in the starfighter , Krell simply cited it to Rex and Fives as further reason that the craft were too dangerous for their use . Krell consequently grounded the fighters , leaving Rex exasperated with Fives and Hardcase ' s actions . That night , while leading a full perimeter sweep to patrol for enemy activity in the outlying forest , Rex was sought out by Fives , Hardcase , and Jesse , who revealed that they were going to attack the supply ship in spite of the consequences for disobedience . When Fives asked him if he intended to stop them , Rex resignedly replied that he would not be able to help them when they got caught . After returning to the airbase , Rex witnessed the trio ' s launch from the hangar bay , and Krell thereafter confronted him about the illegal launch . Covering for his men , Rex claimed that he had authorized their launch so that they could reconnoiter the delta in preparation for the march on the capital , promising a full report to Krell once his men returned . Having concealed Fives ' plan from Krell , Rex was next challenged by Dogma and Tup , who sought to report their comrades to avoid being found complicit in their insubordination . Rex intercepted the two young troopers and managed to turn them away before they could speak with Krell , forcing them to go through him before they approached the general . Eventually , Rex witnessed with Tup a massive explosion through the clouds overhead , and he realized that Fives , Jesse , and Hardcase had destroyed the supply ship . When only Fives and Jesse returned , Rex learned that Hardcase had sacrificed himself to eliminate the orbital transport . They were then interrupted by Sergeant Appo , who reported that Krell had summoned them to the command tower . Standing before the general , Rex attempted to claim responsibility for his men ' s actions , but Fives insisted that he be punished instead , since he had committed the offense . Krell , caring little for the Advanced Recon Commando ' s display of honor , proclaimed that they would be court - martialed , for he brooked no insubordination among his troops . While Fives and Jesse were stripped of their weaponry and locked in the airbase ' s brig , Rex tried to convince Krell against court - martialing them . Krell came to agree with him , but not for the same reasons — believing that Fives and Jesse were defective , and convinced of the need to set an example for the rest of the men , he decided that the pair ' s punishment would instead be execution . Krell ordered Rex to immediately prepare a firing squad for the execution , leaving the captain shocked with his orders . He and several other clone troopers reluctantly went to retrieve Fives and Jesse from the prison levels . Although the two soldiers were disgusted when they learned of their punishment , they resigned to their fates and did not bear Rex blame for Krell ' s decision . Locked in binders , Fives and Jesse were brought outside for the execution , to be delivered by a firing squad that included Kix and Tup . However , when Dogma gave the order to fire , Kix , Tup , and their comrades could not bring themselves to shoot at their own brothers and misfired , instead perforating the wall behind them . Although Dogma insisted that they follow Krell ' s orders , Rex overrode him , having realized that Fives and Jesse did not deserve to be executed for their insubordinate yet heroic actions . While everyone save for Dogma stood with him , Rex had Fives and Jesse freed from their binders , telling Dogma that he would have little success with finding others to conduct the execution . Krell called Rex and Dogma back to the command tower , where they faced his extreme displeasure at their disobedience . Rex stood up to Krell a second time , meeting his threats for retribution with stoic determination of his own . Their standoff was interrupted by an incoming transmission from trooper Waxer of Cody ' s 212th Attack Battalion , who , like Rex , was a veteran of the Battle of Ryloth and the Second Battle of Geonosis . Rex was unaware that the message had been forged . Waxer alleged that the Umbarans had ambushed a clone platoon and had pilfered weapons and armor , warning that they could be gearing up for a devastating attack . Postponing Jesse and Fives ' punishment and ordering them back to confinement , Krell had Rex mobilize his men to preempt the Umbarans with a preliminary strike , making a point to warn the clones not to be confused by the enemies ' armor . Rex then set off with Tup , Dogma , and a forward platoon into the briar fens of the forest . Rex ' s platoon was soon assaulted by enemy forces , though the shrouded environment prevented them from identifying their attackers . He sent his men forward with mortar launchers , and they bombarded the enemy lines with artillery rounds . Kix , using his night vision filters , saw that the opposing soldiers were wearing 212th armor and concluded that they were disguised Umbarans , just as Krell had cautioned . The ensuing battle saw both the 501st and their enemies sustain scores of casualties . Yet as Rex was to soon discover , the attacking soldiers were not Umbarans . While heading through the battlefield , he noticed a fallen enemy soldier in a nearby grove and removed the trooper ' s helmet to verify his identity . To his abject horror , the face underneath was not Umbaran , but that of another clone trooper . Distraught , Rex ran out onto the battlefield , frantically ordering his men to cease their fire and take off their helmets to show that they were not enemies . He took the risk of doing so himself to halt the rising carnage , even tackling one of the enemy soldiers and removing the trooper ' s helmet to further show both sides that all of them were clones , none of them enemies . The 212th - marked soldiers took off their helmets as well , equally aghast that they had attacked their brethren from the 501st . As the hostilities dissolved into shock about the wrongful massacre , the 501st and the 212th tended to the many wounded and fallen . While a distressed Tup and Dogma questioned why their fellow soldiers had attacked them , Kix sought out Rex and reported that he had found Waxer , who had served as the platoon leader from the 212th and would surely have some answers to their questions . Kix led Rex and Dogma to Waxer , who was on the brink of death , being tended to by another 212th trooper . Removing his fellow veteran ' s helmet , Rex spoke face - to - face with the ailing Waxer and asked him who had ordered the 212th to attack the 501st . With his final breaths , Waxer revealed that Krell was responsible . The general had supplied the coordinates to assault alleged enemy forces who , they had been told , were disguised in clone trooper armor . While Waxer died , Rex — having long suspected that Krell ' s recklessness was rooted in darkness — realized that Krell was , in fact , a traitor to the Republic , and he resolved to arrest their general on charges of treason . Gathering the 501st and 212th survivors , Rex told them of his intentions and mobilized them to bring Krell to justice . Knowing that what he proposed was highly treasonous , he gave his troops the option to opt out , though all of them decided to stand by him . Leading his men back to the airbase , Rex first stopped by the prison block with Kix and Tup to release and rearm Fives and Jesse , who fell in line with the others . They all proceeded to the command tower , where they stormed into the control room and surrounded Krell , training their blasters on him . Rex informed Krell that he was being relieved of duty and demanded his surrender , though Krell responded by proclaiming the clones ' inferiority and releasing a massive Force pulse against his would - be captors . Krell activated his double - bladed lightsabers and used them to great effect , cutting through many of the soldiers in a matter of moments . Rex himself narrowly avoided being hit by a corpse that Krell kicked in his direction . Refusing to let Rex and the clone troopers undermine him , Krell broke out of the command tower , smashing through the viewing window and forcing his way through the troops who confronted him below . By the time Rex made it to ground level with Jesse , Fives , and the others , Krell had escaped into the forest , leaving behind a long trail of carnage . Before they could pursue , Rex and his comrades were challenged by Dogma , who tried to retain his loyalties to his general , proclaiming that all of the clone troopers were traitors for turning on Krell . Dogma raised his blaster at his fellow troopers , who did the same to him , but Dogma ' s uncertainty with his own position grew when Rex told him that they were not mindless , obedient soldiers — they were more than droids , and they had a duty to make their own decisions when faced with ill - natured orders . Dogma hesitated , then lowered his blaster , and several other troopers subdued him . Ordering that Dogma be taken to the prison block , Rex led the remainder of his men into the jungle after Krell , splitting them into groups to search for their rogue general . After a while , Rex checked with the other squads to see if anyone had found any sign of Krell . One of the other units had encountered him , and Fives spotted them up ahead , but all of them fell to Krell ' s blades . Approaching Rex and his squad , Krell jumped into the trees and used the Force to magnify his voice , taunting the clone troopers and their loyalty to him . Krell then revealed himself and attacked , dealing a great number of losses . While Rex tried to hold the line with Fives and their rapidly diminishing troops , he was contacted via comlink by Tup , who had a plan to defeat Krell that required the general being lured toward him . Rex observed Tup ' s request to trust him and ordered everyone to circle around Krell and lead him in Tup ' s direction . They soon saw Tup ' s idea : to maneuver Krell into the waiting tentacles of a ravenous vixus , a threat that even the Jedi Master did not expect to encounter . Tup succeeded , and although the hungry creature did not digest Krell , he was left winded upon breaking free of its tentacles . Tup killed the vixus and stunned Krell at point - blank range , and Rex congratulated the rookie trooper on his canniness . Locked in a set of binders , Krell was brought back to the airbase , where Rex and his men installed him in a detention cell adjacent to Dogma ' s . Confronting the shackled Krell , Rex discovered that the Jedi Master had fallen to the dark side . Krell had foreseen that the Jedi were going to lose the Clone Wars and strove to become Count Dooku ' s new apprentice , intending to curry favor with the Sith Lord by driving the Republic from Umbara . Although Rex refused to let Krell ' s ambitious plans come to fruition , the Jedi Master believed that the Umbarans would soon retake the airbase , at which point the Separatists would set him free . Troubled by their deposed general ' s resolve , Rex , Fives , Jesse , and Tup returned to ground level , where they witnessed bombings overhead from the Umbarans ' long - range missiles . Appo reported to Rex that the command center ' s transmitter had been repaired , as it had been offline not due to enemy interference , but because of sabotage . Appo went on to convey that Kenobi ' s forces had conquered the capital city , though the remaining Umbarans were now regrouping to retake the airbase . Rex ordered Appo to mobilize all of their men on the perimeter in preparation for what looked to be a full - scale enemy assault . Rex realized that Krell , having sabotaged the transmitter , had been against the clone troopers from the beginning , leading Fives to conclude that if the Umbarans took custody of Krell , he would betray all of the Republic intelligence in his possession . Jesse and Tup agreed that they had to do something to silence Krell , and Rex reluctantly conceded that they would have to execute him . The captain returned to the prison block with Fives and Jesse to carry out the task at hand . While Fives brought Dogma out of his cell , Rex told Krell to turn around and step toward the back wall , then ordered him onto his knees . He drew one of his blaster pistols and had Jesse deactivate the shielded door of Krell ' s cell . Despite the necessity of executing the Jedi Master to prevent his information from falling into Separatist hands , Rex hesitated with killing an unarmed Jedi , even in spite of his crimes against the 501st and the 212th . Krell sensed his hesitation and savored his fear , calling out the captain on his inability to deliver the killing shot . In the end , the fatal shot came not from Rex , but from Dogma , who had lifted one of Fives ' blaster pistols . Having been one of Krell ' s most ardent supporters , Dogma had consequently been devastated by his betrayal . Their general permanently removed from duty , Rex and the others exited from the detention level . Republic LAAT / i gunships soon landed at the airbase , and Dogma was taken away on one of them , exchanging a respectful nod with Rex before leaving . Fives informed Rex that Kenobi ' s battalions had routed the final Umbaran holdouts — the Battle of Umbara was over , and the Republic was now in control of the Shadow World . With the hostilities abated , Rex wondered aloud why they were fighting the war and what would happen to the clone troopers when it ended . Fives , Jesse , Tup , and the others did not have an answer for him , and they simply watched as Dogma ' s gunship lifted off into the darkened Umbara sky . Following the campaign , Rex reported to his superiors on Krell ' s treason against the Republic and his betrayal of the Jedi Order , though responsibility for his execution remained with the arrested Dogma . The Zygerrian Slave Empire . Following the Confederacy ' s invasion of the Togrutan artisan colony of Kiros — a peaceful society that had , up until that point , avoided being ensnared in the war — the Jedi High Council sent a Grand Army detachment led by Skywalker , Tano , and Kenobi to liberate the world . Troops from Rex ' s 501st Legion and Cody ' s 212th Attack Battalion were assigned to the joint task force , which arrived at Kiros aboard a Republic Navy fleet ten rotations after the Separatists ' takeover of the world . Rex served as one of the officers aboard Skywalker ' s new flagship , a " Venator " - class Star Destroyer that had replaced the " Resolute " , which had fallen at the previous Battle of Sullust . Rex discovered that there were no Separatist craft in the system from the earlier invasion force and , on Kenobi ' s order , moved their Star Destroyer into position for deployment . The Republic troops transferred to an " Acclamator " - class transport , whereupon they departed for the surface with AT - TE and AT - RT walkers aboard LAAT / i gunships . Upon landing in the capital city , Skywalker and Kenobi elected to patrol the city for Separatist activity on BARC speeders . Rex manned the sidecar of Kenobi ' s speeder while Tano rode with Skywalker , with other speeder - mounted 501st troopers falling into line behind them as they proceeded through the city streets . Speeding through the city , Rex and his comrades were surprised to encounter an utter lack of Togruta colonists , who Skywalker and Kenobi assumed were hiding to wait out the fighting . Kenobi believed that they would have an easier time repelling the Separatists without having to worry about the risk of civilian casualties , but Rex was apprehensive about the situation , noting that the Separatists had never hesitated in the past to exploit civilians as living shields . As they headed for the city center , the silence from the absent colonists was broken by the appearance of Separatist forces ahead , taking the form of BX - series droid commandos riding Flitknot speeder s . Rex and his men quickly returned the approaching biker droids ' fire with their BARC speeders ' repeating blasters , and they cut through a number of the droid commandos before passing by them . When the battle droids caught up with them again from behind , Rex and Tano revolved their sidecars and focused their blasterfire on the enemy units , eliminating the remainder of the droids between the two of them . As they approaching the governor ' s tower at the city center , Rex and his comrades encountered more Separatist defenses , this time including two Armored Assault Tanks . While the others took care of the battle droids , Rex made quick work of one of the tanks , blowing it to pieces with a warhead from his RPS - 6 rocket launcher before it could fire at his men . Tano destroyed the other tank with a pair of thermal detonators , and the last of the battle droids in the area were eradicated . At Kenobi ' s behest , Rex deployed his 501st troops to secure the vicinity around the city center . AT - TE walkers were brought in as the Republic forces established a perimeter around the governor ' s tower , wherein the Separatist commander , a Zygerrian known as Darts D ' Nar , had barricaded himself . When Kenobi went to negotiate terms for surrender with D ' Nar , he discovered that D ' Nar had set up thermal annihilator bombs all over the city to be used as last - resort leverage against the Republic forces . Skywalker and Tano deactivated all nine of the annihilator bombs before D ' Nar could use them to destroy the capital , and they also managed to prevent D ' Nar from escaping off - world aboard his Zygerrian slave ship , the " Tecora " . Although the Republic succeeded in securing Kiros , a planetary bioscan conducted by Admiral Yularen revealed that the Togruta colonists , all 50 , 000 of them , had completely vanished from their world . When Skywalker and Tano interrogated him , D ' Nar revealed that the Zygerrian queen was reviving the Zygerrian Slave Empire of old , a slave - trading government that had prospered for centuries before the Jedi Order had dismantled it , forcing its slave trade to fester in the criminal underworld . The Togruta were to be auctioned off into slavery on Zygerria , but the Jedi were determined to prevent the colonists from becoming slaves . To that end , Rex , Skywalker , Tano , and Kenobi took the " Tecora " to Zygerria , where they intended to infiltrate the Slave Empire and locate the missing Togruta . En route to the Zygerria system , Rex , Skywalker , and Kenobi assumed uniforms to pose as Zygerrian slave traders , while Tano masqueraded as a Togruta slave . After landing at a Zygerrian slave market , Rex and his comrades set off on their mission . While Skywalker distracted the Zygerrian queen , Miraj Scintel , Rex and Kenobi were to find the Togruta colonists . Splitting up from Skywalker and Tano , whom Prime Minister Atai Molec escorted to the Zygerrian Royal Palace , Rex and Kenobi proceeded to the Royal Palace ' s outdoor slave cells , where they discovered only one Togruta prisoner , an ailing Governor Roshti of Kiros . With royal Zygerrian guard s patrolling the compound , Rex kept watch for Kenobi to retrieve Roshti , who was too weak to reveal anything about the whereabouts of the other missing Togruta . Recognizing the need to spirit Roshti away from the Royal Palace , Kenobi commandeered a brezak lizard mount from a Zygerrian guard and helped Rex bring Roshti onto the creature ' s back . As other Zygerrian guards in the vicinity caught sight and ordered them to stop , Rex took up the brezak ' s reins and steered their mount for the other end of the compound . However , a Zygerrian guard shot Kenobi in the shoulder , and both he and Roshti fell off the brezak . Rex was forced to leave them behind and escaped while Kenobi and Roshti were captured . That evening , Rex proceeded to the royal auction house to provide support for Skywalker and Tano at Queen Scintel ' s Royal Slave Auction , in which the Togruta colonists were to be sold into slavery . While a Zygerrian auctioneer introduced the recaptured Roshti as a sample of the Togruta , Rex caught the eye of Skywalker , who was with Tano and Scintel in the queen ' s private viewing box , and showed him his acquired Zygerrian blaster rifle as a gesture of being ready for action . However , Rex and his comrades were met with a grim surprise when Kenobi was brought out onto the auction block as a " special guest " of the queen . Denouncing the Jedi as slaves to a corrupt Republic Senate , Scintel ordered Skywalker to whip Kenobi to teach the Jedi Master his place . Just as he activated his shock whip , Skywalker checked that both Rex and Tano were prepared for action , then joined Kenobi in attacking the Zygerrian guards on the auction block . As the guards in the stands opened fire on his comrades below , Rex disarmed one of the Zygerrians and shot at another group of them , exploding that part of the floor . With two blaster rifles in hand , he was stopped by a trio of royal guards and was then attacked from behind by another . Both Rex and his assailant fell out of the stands , landing on the ground several stories below . Before Rex had much time to recover , Scintel sent in reinforcements to subdue the infiltrators . The touch of a shock whip electrified Rex into unconsciousness , and Skywalker , Tano , and Kenobi were similarly defeated . The Zygerrians sent all four of them into slavery : While Scintel forced Skywalker to become her personal bodyguard , Rex and the others became her leverage to keep Skywalker in his place . Tano was imprisoned outside the Royal Palace , and Rex and Kenobi , fitted with shock collars , were meanwhile sent to be processed as slaves with Roshti . The Zygerrian slave ship " Spartan " transported Rex , Kenobi , and Roshti to the volcanic world of Kadavo , where the Zygerrians maintained a mining complex over a volcanic crater . Rex and the others laid eyes on the population of Kiros , whom Agruss , the keeper of the facility , was subjugating into slavery for processing by the Zygerrian Slave Empire . As part of his welcome for his newest charges , Agruss dropped seven of the Togruta colonists into the crater below , making it clear that the Togruta would suffer for any trace of defiance from Kenobi . Rex and Kenobi were quickly forced into work alongside the Togruta in mining materials at the facility . On one occasion , while Kenobi was commenting to Rex on the state of the despairing Togruta , one of the Zygerrian slave masters interrupted him , whipping Kenobi as punishment for speaking . The Zygerrian then turned his shock whip on a nearby Togruta slave , forcing Kenobi to submit to save the colonist ' s life . Rex and Kenobi thus realized that the Zygerrians intended to break Kenobi ' s spirit by punishing the Togruta instead of him . As Rex and Kenobi ' s days in slavery continued , they were shackled in handcuffs and brought before Agruss in the facility ' s command center to speak with none other than Count Dooku via holoconnection . Having learned of the Zygerrians ' capture of the Jedi , Dooku had ousted an uncooperative Scintel from power and had ordered the immediate execution of Rex and Kenobi . Just then , the " Tecora " made an unscheduled landing at the Kadavo mining complex . Aboard were Skywalker , Tano , and R2 - D2 , who had escaped from Scintel ' s custody on Zygerria and had come to rescue Rex , Kenobi , and the Togruta . The Zygerrians destroyed the " Tecora " , though an unfazed Skywalker and Tano began to cut through the facility ' s outer blast door with their lightsabers . Meanwhile , the Zygerrians rounded up all of the Togruta colonists in a holding cell and prepared to dump them into the crater below if Skywalker did not call off his forces . Nevertheless , Skywalker continued his efforts when his reinforcements arrived : Plo Koon and a Republic Star Destroyer under the command of Admiral Barton Coburn . With the complex under attack by Koon ' s starfighter forces , Kenobi used the Force to sever his and Rex ' s shock collars , and the two attacked their Zygerrian captors . Rex disabled his handcuffs with a Zygerrian ' s electrostaff and took down several slavers on his own , pilfering an electrostaff from one and head - butting another . In response to the outbreak of hostilities , Agruss activated the mechanism that would open the Togruta slaves ' holding cell over the crater , jamming the controls so that Rex and Kenobi could not deactivate it . As Rex and Kenobi finished off the Zygerrian guards , the cornered Agruss attempted to barter for his life , taunting Kenobi that a Jedi would not kill an unarmed man such as himself . Though Kenobi was unable to pass judgment on him , Agruss failed to account for Rex , who did not share Kenobi ' s reservations and threw an electrostaff at Agruss . The staff plunged straight through Agruss and the back of his hoverchair , killing him . Rex and Kenobi then left the command center and joined Skywalker out on the landing pad , where Koon ' s Wolfpack landed an LAAT / i gunship to retrieve them . In the meantime , Coburn took the " Arquitens " - class light cruiser " Hand of Justice " to assist Tano in rescuing the Togruta slaves from their holding cell . Once all of the Togruta were safely aboard the " Hand of Justice " , the Republic ' s LAAT / i gunships moved in and compromised the building ' s supports , plunging the entire complex into the crater below . Following the successful rescue , Rex , Skywalker , Tano and Kenobi were taken to Koon ' s Star Destroyer with the Togruta colonists , who began to receive treatment to recover from their ordeal in enslavement . After receiving Roshti ' s thanks for their efforts , Rex and Commander Wolffe convened in the main hangar with their Jedi commanders to debrief the operation . When Supreme Chancellor Palpatine became the target of a Separatist kidnapping plot , Rex and some of his men from the 501st were assigned to be bodyguards for him , serving as extra security at the Chancellor ' s Suite on Coruscant . Meanwhile , the Jedi High Council authorized an operation to infiltrate the enemy plot . The sniper Rako Hardeen was allowed to appear to kill Kenobi , who then went undercover as Hardeen to gain the trust of Moralo Eval , the mastermind behind the conspiracy . After learning from Palpatine that Hardeen — actually Kenobi in disguise — had escaped to the planet Nal Hutta with Eval and Cad Bane , Skywalker went after the sniper who had murdered his former Master , while Rex and two of his soldiers remained behind to guard Palpatine . That night , Mace Windu contacted Rex via the latter ' s Imagecaster and asked for Skywalker , who had failed to respond to his calls . Although Rex tried to hide his general ' s unsanctioned departure from the capital , Palpatine revealed that he had personally sent Skywalker to Nal Hutta , believing that the High Council should have more faith in Skywalker and his abilities . Palpatine ended the exchange with Windu by informing Rex that he was withdrawing for the night , and Rex and his men escorted him back to his apartment . Thanks to Kenobi ' s undercover efforts , the Jedi Order thwarted the kidnapping plot two days later at the Festival of Light on Naboo , preventing Eval and Bane from capturing Palpatine . Training the Onderon rebels . In 20 BBY , as the Clone Wars entered their third year , Rex accompanied Kenobi to the Jedi Temple to watch a sparring duel between Jedi Master Quinlan Vos and a Jedi Knight . New orders came in soon enough for Rex when the High Council received a plea for aid from the Onderon rebels , a grass - roots insurgency based on the planet Onderon . Despite their world ' s alignment with the Confederacy , the rebels refused to recognize the legitimacy of their Separatist - loyal monarch , King Sanjay Rash , and sought to deliver Onderon from battle droid occupation . Instead of direct intervention by way of the Grand Army , Skywalker developed the idea of sponsoring training for the local rebels , the objective being to teach them self - sufficiency while also engaging the Separatists on another front . Rex joined Skywalker , Tano , and Kenobi as the fourth member of the team of advisors who would be instructing the rebels . Once they had prepared for the journey to Onderon , Lieutenant Hawk transported them to the night side of Onderon aboard the Republic shuttle " Valkyrie 2929 " , hovering over the drop zone in the Onderonian jungle long enough for Rex and his robed Jedi comrades to reach the ground via a jetpack and the Force , respectively . They were soon found by a dalgo - back patrol of guerrillas led by the young Steela Gerrera , who took Rex and the others to the insurgency ' s secret base a half - kilometer to the east . Rex and his comrades arrived at the rebel camp at daybreak , at which point Steela introduced them to her brother , Saw , the self - proclaimed leader of the insurgency . Among the other rebels was Lux Bonteri , the quondam senator of Onderon and an old friend of Tano . Skywalker and Kenobi wasted no time in launching the insurgency ' s training , calling a gathering to introduce themselves to their new trainees . After Rex took a group of volunteers to retrieve supplies from their entry point , the Jedi decided to begin with a session on countering an Armored Assault Tank , a common sight amidst the Separatists ' forward infantry . Using a captured tank as a visual aid , Tano laid out the vehicle ' s schematics to their rebel trainees , explaining that both the top and front hatches had to be disabled to fully immobilize the tank . As a demonstration , Rex , taking an EMP grenade in each hand , tossed one charge into the front cabin and then swung onto the main cannon to reach the topside chamber . He somersaulted off the tank a moment before it was disabled by the combined electromagnetic pulse . To practice the maneuver , Skywalker organized the rebels into teams of two , as each soldier would be able to target a separate port . Although the first pair , Saw and Bonteri , botched their attempt when the latter lost his hold on the main turret , Rex kept the exercise moving , supplying the next few groups with EMP grenades . He rallied each pair through the drill , treating them as soldiers and pushing them to give it their all . In the next lesson , Rex , Skywalker , Tano , and Kenobi taught the insurgents how to disable a shielded droideka . Controlling three reprogrammed units from a wrist remote , Rex activated the shield of one of the sample droidekas , then released several blaster shots at the shield to demonstrate its ability to repel high - velocity attacks . Tano presented the solution to the shield : a stationary or slow - moving object , such as a carefully tossed EMP grenade , one of which she lobbed through the shield , deactivating the destroyer droid . When it was time for the rebels to conduct the exercise , only Bonteri mastered it on the first try . Rex broke the soldiers into pairs for further practice , in which others , including Saw , were able to perfect the maneuver . Following that , the Jedi moved on to firearm practice , with Steela exemplifying her natural abilities with a sniper rifle . Rex made sure to inform the rebels that a headshot was the only effective way to deactivate a battle droid , as the enemy units would otherwise continue relaying intelligence to central command . At that point , the insurgency ' s training escalated into full - blown combat , as a patrol of droids stormed out of the surrounding trees to quash the fledgling rebellion . Rex shouted for everyone to take cover as enemy rockets and cannonades began to fly into the camp . Jumping behind a wall with several of the rebels , Rex opened fire on the invading droids , the first wave of which was demolished thanks to the insurgents ' homemade disruptors . The next wave of enemy infantry was headed by an Armored Assault Tank , which spawned considerable devastation across the camp until Bonteri and Saw worked as a team to disable it with thermal detonators , just as Rex and his comrades had taught them . Despite several casualties , the young insurgents emerged victorious over the droids . Emboldened by their success , the rebels decided to infiltrate the capital city of Iziz , where they would bring the fight directly to King Rash and his Confederate supporters . Posing as game hunters with a dalgo - drawn caravan , Rex and the others gained access to the walled Iziz from the battle droid guards at the city gates , then split up to avoid detection . Rex accompanied Tano on her dalgo - drawn cart to find supplies for the rebels , rendezvousing with the others after nightfall . The rebels ' next course of action was to carry out a series of small - target strikes on battle droid patrols throughout Iziz . Rex helped coordinate one of the assaults , targeting a Separatist checkpoint in the city , while Skywalker , waiting with Steela on a nearby rooftop , observed their performance . After Steela sniped at the B1 battle droid manning the checkpoint , then disabled the security shield ' s controls with another blast , a DSD1 dwarf spider droid emerged and targeted her from street level . At that point , Rex signaled to the two soldiers accompanying him , and he watched as the insurgents used an EMP grenade to disable the dwarf spider droid . Rex , Skywalker , and the others proceeded with Tano , Kenobi , and the rebels to their safe house in Iziz to review their progress . Although Bonteri , the Gerreras , and the other rebels were proud of their growing number of successes , Kenobi and Tano — who , like Skywalker , had been monitoring the strikes as well as civilian reactions — voiced their concern that the local citizenry was frightened by the outbreaks of violence . While Bonteri proposed that they make a show of strength to garner public support , Rex withdrew from the safe house with Skywalker , Tano , and Kenobi . The group decided that Skywalker and Kenobi would return to Coruscant to report back to the High Council . Meanwhile , Tano would remain on Onderon as an advisor for the rebellion while also providing firsthand developments to the Council . With that , Rex left for Coruscant with Skywalker and Kenobi . After the rebels won a major victory by destroying Iziz ' s power generator , Rex was present at their following celebration via hologram with Skywalker and Kenobi , who offered encouragement and advice to the insurgents . In particular , Rex noted that Steela was emerging as a born leader , to which Kenobi agreed . Thanks to their training from Rex and the Jedi , the rebels were able to liberate Onderon from the Confederacy . Although Steela was elected to replace Saw as the rebel leader , she died during their decisive clash with the Separatists , becoming the final casualty in the rebellion ' s campaign for freedom . A comrade turned fugitive . While stationed aboard a " Venator " - class Star Destroyer , Rex joined Skywalker , Kenobi , and Cody on the bridge to review an intercepted transmission from General Grievous . Due to a new encryption code that the Separatists had recently developed , the bridge team was unable to decipher the audio of Grievous ' s message . When Republic Intelligence encountered similar results , the Jedi High Council formed a squad of Republic droids to retrieve the Separatist encryption module responsible for encoding the transmission . Not only did the so - called D - Squad complete its mission , but it also thwarted a Separatist plot to sabotage the Republic strategy conference . When Republic Intelligence got wind of a new " Subjugator " - class heavy cruiser — of the same class as the " Malevolence " , which had terrorized Republic systems earlier in the war — that the Confederacy was constructing over a planet in the Enoth system , Rex was among the clone forces that went to target the nearly completed warship . He was present when Skywalker led a briefing for the assembled troops aboard his Star Destroyer . While Rex was to lead the ground unit that would destroy the heavy cruiser ' s energy shield generator , located on the planet below , Skywalker would lead the starfighters of Red Group and Blue Group in eliminating the battleship itself . After they reached the Enoth system , Rex led his battle group to the planet ' s surface with a pair of AT - TE walkers . As he reported to Skywalker , who was leading the space forces against the battleship ' s Vulture droid defenses , the clone infantry made progress toward the generator site , albeit slowly . Once they were within optimal firing range , Rex ordered the AT - TE walkers to open fire on the shield generator , to great effect . He then gave Skywalker the all - clear , and Skywalker ' s squadrons were able to obliterate the heavy cruiser — mainly due to the sacrifice of clone Z - 95 pilot Shooter . In 19 . 1 BBY , in what was to become the final month of the Clone Wars , Rex and the 501st were assigned to respond to a Separatist invasion of Cato Neimoidia , a former Neimoidian purse world and major holding of the Trade Federation . While Skywalker and Tano led a starfighter assault on the Confederate aerial defenses , Rex followed closely behind , overseeing the main body of troops from the gunship " Lucky Lekku " , which launched from the Republic fleet in orbit . Once his 501st landing force had reached Cato Neimoidia ' s bridge cities aboard its squadron of LAAT / i gunships , Rex received a request for retrieval from Skywalker , who had been stranded with Tano on an outcrop after Pistoeka sabotage droids , also known as buzz droids , destroyed his Eta - 2 interceptor . Rex diverted the " Lucky Lekku " to the cliff to pick up Skywalker and Tano . The two Jedi were thereafter recalled to the Jedi Temple to investigate a terrorist bombing there , and they returned to Coruscant , as did Rex . Although Skywalker and Tano apprehended Letta Turmond , a Republic citizen who had engineered the bombing , Turmond was murdered while in Republic custody . Tano was framed for the crime , and as a result , newly promoted Admiral Wilhuff Tarkin , who was leading the Republic Military ' s investigation into the bombing , arrested and incarcerated her in the Republic military base . Despite an attempt on Skywalker ' s part to speak with his detained Padawan , the base ' s security staff — headed by Clone Commander CC - 1010 of the Coruscant Guard — withheld Skywalker from seeing her as per Tarkin ' s orders . When Rex received word that Tano had escaped from her prison cell , he rushed to the military base with Skywalker aboard a Praxis Mk . I turbo speeder . Once there , he and Skywalker hurried after CC - 1010 , nicknamed " Fox , " who was pursuing Tano through the corridors of the compound . Upon discovering the bodies of three of his clone shock troopers , killed by lightsaber wounds and left in Tano ' s path , Fox concluded that Tano had slaughtered his men and ordered his search team of shock trooper s to shoot to kill if they found her . Catching up with Fox , Skywalker promptly countermanded the order , while Rex argued with the commander , refusing to believe that Tano would have killed the troopers . Skywalker silenced Rex and Fox in mid - argument and called out to Tano , who was still inside the base . Tano claimed that she was being framed her for the murders , and though Skywalker assured her that he believed in her innocence , she was convinced that no one else would and refused to capitulate . Assuming command of the manhunt for his Padawan , Skywalker ordered Rex to relay an all - points bulletin to the base ' s security team . In light of the current evidence , Rex was forced to report that Tano had killed the three troopers and classified her as armed and dangerous . As Rex and Skywalker joined Fox outside the base to oversee the external security patrols , Fox reported that they had spotted Tano heading for the industrial pipeline that led away from the complex . Skywalker ordered all of the shock troopers to set their blasters to stun mode , intending to take her alive . Rex , Skywalker , and Fox caught up on foot with the search teams just as they surrounded Tano near the pipeline ' s central viaduct . In spite of being outnumbered , Tano continued to evade capture , carving a hole into an adjacent pipe with her lightsaber and jumping into it . Rex followed his comrades in rappelling down into the pipe network in pursuit of Tano . With spotlights activated , he and Fox searched for the fugitive Padawan amidst the shadows of the sewers . During the hunt , they were separated from Skywalker , who found Tano first and tried to convince her to turn herself in . However , Tano was adamant against doing so and was determined to clear her name . Just as Rex and Fox found Master and Padawan at the edge of the water pipe , they were unable to prevent the latter from jumping out of the shaft . Rex and the others could do nothing but watch as she landed on a freighter far below , descending into the cavernous shipping portal of the Coruscant underworld . With Tano now being framed for the murder of the clone officers at the military base in addition to the homicide of Letta Turmond , Tarkin concluded that Tano was further responsible for the bombing of the Jedi Temple , given that Turmond had admitted to collaborating with a dissident Jedi while Tano was interrogating her . The evidence even compelled the Jedi High Council to consider the possibility that Tano was guilty , resulting in Master Yoda dispatching two teams of Coruscant Guard shock troopers to detain Tano . Rex and Skywalker headed the first team , while Plo Koon and Commander Wolffe received command of the second . Both squads set out for the Coruscant underworld aboard a pair of Republic police gunship s . As they crossed the ecumenopolis en route to the underworld ' s shipping portal , Rex interfaced with the local Coruscant Underworld Police , who oversaw security on the lower levels and claimed to have sighted Tano in the vicinity of Level 1312 . Rex relayed the report to Skywalker , who ordered their search party ' s pilots to set course for that area as they descended into the underworld . Just as they neared the landing deck of Level 1313 , Skywalker ordered the police gunships to train their spotlights on terminal 24 , where Rex and the others spotted Tano in mid - conversation with an unexpected confederate : Asajj Ventress , who had ventured into bounty hunting and reformed her ways — to a degree — since being jilted by Count Dooku . Skywalker immediately jumped out of the police gunship and gave pursuit on foot , though Ventress cut him off by activating terminal 24 ' s ray shield before bolting out of sight with Tano . In response , Skywalker sent out the search party ' s probe droids in search of the fugitive pair . The probes eventually located Tano and Ventress on Level 1312 , where Wolffe and his team of Coruscant Guard troops attempted but failed to subdue the pair . In the meantime , Rex remained with his shock troopers aboard their police gunship and continued to monitor reports from the Underworld Police , hoping to come across another lead as to Tano and Ventress ' s whereabouts . When Rex heard word of suspicious activity on Level 1315 , Skywalker had their police gunship adjust course for that area . After regrouping en route with Koon and Wolffe , Rex and Skywalker proceeded with their soldiers to the abandoned munitions warehouse where the police report had originated . Wolffe was the first one on the scene and — upon sighting Tano — stunned her at point - blank range before she could emit more than a few words . Upon further examination of the vicinity , Wolffe found that Tano had been inspecting several crates of nano - droids , identical to the ones that had been used in the bombing of the Jedi Temple . Rex and his comrades took Tano into custody and withdrew from Level 1315 , with Rex and Wolffe joining Skywalker , Koon , and the detained Tano aboard one of the police gunships while their shock troopers rode aboard the second gunship . During the flight to the Jedi Temple , Rex and Wolffe held the comatose Padawan upright while Skywalker and Koon holographically reported back to the High Council . Though Ventress ' s exact role in the situation remained a mystery , as she had not been present at the Level 1315 warehouse , Tano was still suspected of sedition on account of being found with the nano - droids . By all accounts , the case against Tano was gaining more momentum , since she had nothing but her word to defend her innocence . As a result , the Jedi Council expelled her from the Jedi Order so that she could be put to trial under a Republic military tribunal . Skywalker eventually discovered that Barriss Offee was the true culprit , having orchestrated the Jedi Temple bombing and then framed Tano for her own crimes . Although Offee was arrested and later confessed to her machinations , Tano ultimately decided not to rejoin the Order , resigning her Padawan status and her rank in the Grand Army to find a new path for herself . The mystery of Tup and Fives . When the Republic set its sights on seizing the planet Ringo Vinda , Rex helped Skywalker lead the 501st infantry that was assigned to the campaign . The Republic and Separatist forces clashed for control of the orbital space station that encircled the entire world , eventually becoming based out of opposite sections of the facility . Rex and his comrades became locked in combat with the Separatist battle group for at least five rotations , but it was not until the arrival of reinforcements under the command of twin Jedi Generals Tiplee and Tiplar that they began to make headway toward breaking the ongoing stalemate . As part of their renewed offensive , Rex and Skywalker led the 501st in pressing through one of the station ' s hallways , while Tiplee and Tiplar ' s men concentrated on repulsing the droid forces in an adjacent passage . Once they had reached a communications center , Rex and Skywalker regrouped with the twin Jedi Generals and claimed the facility for their own use . They next set their sights on a command center up ahead , out of which the Separatist commander , Admiral Trench , was operating . The Jedi initiated phase two of their battle strategy : While Tiplee and Tiplar would each lead their men to Trench ' s command post via the outer two of three passageways , Rex and Skywalker would oversee a 501st advance through the middle corridor . Upon learning from Tiplee and Tiplar ' s clone officer , Commander Doom , that his men were severely depleted , Skywalker transferred Fives , Tup , and ten other soldiers from the 501st to Doom and Tiplar ' s squad . With that , Rex joined Skywalker in spearheading the 501st ' s push , blasting through a number of B1 battle droids in the central passage . The hallway eventually opened into a large room in front of Trench ' s post , and Rex and the others were faced with DSD1 dwarf spider droids and super battle droid rocket troopers . As they made progress toward Trench ' s position , Tup — in a trance - like state — executed Tiplar at point - blank range . Tup ' s shocking exploit , combined with the appearance of a squad of droidekas , crumbled the Republic ' s advance , and Skywalker ordered a full retreat , with Fives taking Tup into custody . Once Rex and the others had fallen back to the communications center , they welded shut the blast doors to cut off the pursuant battle droids , then turned to the perplexing matter of Tup . Alongside Fives , Kix , and Skywalker , Rex proceeded to interrogate the restrained Tup . Slipping back into his puzzling trance , Tup began to state that " good soldiers follow orders " before attacking Tiplee , who , undeterred , telekinetically repelled him with the Force . Skywalker decided to have Tup transferred to the medical bay of one of the Republic fleet ' s Star Destroyers before he tried to harm anyone else . Once Kix had completed a series of scans on Tup , the mystery deepened . After Rex , Skywalker , Fives , and Tiplee entered the ward , Tup — who had been strapped to a bed — questioned Fives about what had happened to him , evidently displaying no knowledge of his murder of Tiplar . Tup then began to panic , and a 2 - 1B medical droid promptly sedated him . At Skywalker ' s prompting , Kix reported that Tup had passed all of his scans , so Kix believed that Tup ' s behavior was the result of combat - related stress . Rex disagreed with Kix ' s diagnosis of an emotional breakdown , since all of them as clone troopers had been designed to withstand high amounts of stress , and Fives agreed . Rex and the others continued their conversation in the hallway outside , entertaining the possibility that the Separatists could have engineered Tup ' s breakdown by way of a virus — as Tiplee put it , biological warfare . Still , Kix advised that Tup undergo extensive examination back on Kamino , the only place with facilities that were equipped for that level of surgical scrutiny . With Skywalker ' s approval , Tup and his hovergurney were moved to the Star Destroyer ' s hangar . Rex , Fives , and Skywalker saw Tup off as he was ushered onto a waiting " Nu " - class attack shuttle for transport back to Kamino . Just as Tup ' s shuttle was about to leave the system with an escorting quartet of ARC - 170 starfighters , Admiral Yularen and the bridge team aboard Skywalker ' s flagship lost contact with the craft . Rex joined Fives and Skywalker aboard an " Eta " - class shuttle to investigate the last known location of Tup ' s transport , and there they were met with a grim surprise : The shuttle ' s hull had been breached , with Rex theorizing that it was the work of Separatist buzz droids . Once they had outfitted themselves in breathmask survival gear , Rex and Fives joined Skywalker in entering the drifting " Nu " - class shuttle , finding nothing but carnage within , as the crew and embarked clone trooper detail had all been massacred . Amidst the floating bodies , Skywalker found Tup ' s hovergurney with its restraints severed . Fives believed that the Separatists ' kidnapping of Tup indicated that they were responsible for his breakdown , and Skywalker did not rule out that possibility . Returning to their " Eta " - class shuttle , Rex and his comrades followed Tup ' s exceedingly faint tracking signal to the Separatist - held side of the space station , specifically the enemy ' s principal hangar . Skywalker decided that the shuttle would drop them off at the hangar , and he , Rex , and Fives would space - walk on their own from there . Upon reaching the Separatists ' hangar , Rex and his comrades found it was occupied with hundreds of battle droids , some of which were loading Tup onto a Maxillipede shuttle . Rex voiced skepticism regarding their chances of surviving a direct confrontation with the droid army , earning Skywalker ' s comparison of his sentiment to that of the perpetually cautions Kenobi . As Tup ' s shuttle took off , Fives devised the idea of boarding the vessel via ascension cables , thereby avoiding the numerous droids in the hangar . Rex and Fives each attached a grappling extension to one of their blaster pistols and rappelled onto the shuttle as it passed overhead , with Rex bringing along Skywalker . After entering the airlock , Rex and the others broke into the main cabin and took down the BX - series droid commandos guarding the barely conscious Tup . While Skywalker defeated the shuttle ' s commander , the super tactical droid Kraken , Rex fought his way to the cockpit and gunned down the pair of OOM pilot battle droids at the controls . With Rex at the helm , they immediately piloted the captured shuttle to Skywalker ' s flagship , since Fives noted that the ailing Tup ' s life signs were dropping , indicating that he was close to death . Sending Tup to Kamino was paramount for him to be cured . Once Rex and the others were back aboard Skywalker ' s flagship , a " Consular " - class cruiser designated as medical frigate 517 was prepared as Tup ' s transport . Skywalker assigned Rex to oversee the transfer , requiring a full report upon his return from Kamino . Prior to their departure , Fives asked for permission to accompany Rex to Kamino , as Tup was his best friend . Rex granted Fives ' request but ordered him to proceed by the book so as to avoid further setbacks . Once they had arrived on rainy Kamino , Rex and Fives ushered Tup and his hovergurney into Tipoca City ' s Military Complex , where they were received by Shaak Ti and Doctor Nala Se , Chief Medical Scientist of Kamino and one of the principal engineers of the Grand Army ' s cloning program . While Se and a team of clone troopers took Tup to an observation room , Ti informed Fives that he would be undergoing a complete medical exam . She reasoned that if a virus was the cause of Tup ' s behavior , then Fives had likely been exposed to the same contagion . Although apprehensive about leaving his friend ' s side , Fives agreed to do so if it would help pinpoint a cure for Tup . After Ti informed him that Skywalker had ordered him back to the war zone , Rex told Fives to take care of himself as well as Tup before departing from Kamino . Following the Battle of Ringo Vinda , Rex and the 501st returned to Coruscant . In the intervening time , Tup died after a tumor was removed from his brain due to Fives ' intervention . After disobeying orders and evading arrest on Kamino , Fives discovered that the tumor was actually an inhibitor chip — an inorganic cerebral implant that the Kaminoans had inserted into all of the clone troopers at the embryonic stage . In Tup ' s case , his inhibitor chip had corroded and malfunctioned , leading to his unstable behavior . Upon arriving on Coruscant with Ti to plead his case to Chancellor Palpatine , Fives allegedly attempted to assassinate Palpatine and escaped into the lower levels of the ecumenopolis . Following Fives ' getaway , the entirety of Coruscant ' s security and clone trooper forces were allocated to a manhunt for the rogue ARC trooper , but Jedi involvement was not requested . As a result , Skywalker volunteered to head the Order ' s undercover investigation into the matter , with Rex joining his Jedi General in the search for Fives . According to Ti , Fives believed that he was the victim of a conspiracy , Separatist or otherwise . Ti also warned Skywalker that since Fives had extracted his inhibitor chip — as he had done for Tup — his behavior might be as erratic as that of his late comrade . Rex and Skywalker soon received a promising lead in the form of a communiqué from Kix , who had run into Fives at the clone sports bar known as 79 ' s . Kix relayed a set of coordinates where Fives had requested a meeting with Rex and , by extension , Skywalker . Rex and Skywalker took a police gunship to the specified location , a portal warehouse on Level 1325 . After disembarking , Rex and Skywalker warily entered the darkened warehouse , blaster pistols drawn and lightsaber ignited , respectively . Inside the building , they called out to Fives , who responded by thanking them for trusting him and then asked them to drop their weapons . Once Fives said he was unarmed , Rex and Skywalker complied , setting down their weaponry on a nearby crate . However , Fives , appearing disheveled and deranged , did not emerge from the shadows until he had trapped the pair in a ray shield . The beleaguered clone appealed to his irate comrades that he did not have a choice , saying he had been framed because he had uncovered a massive deception , the scope of which reached the highest echelons of the Republic . Fives claimed that the inhibitor chip in every clone trooper would even make them follow orders to kill the Jedi — as Tup had done to Tiplar . Rex and Skywalker did not know how to react to Fives ' improbable claims , and their visible skepticism left Fives frustrated with their lack of belief in him . After Skywalker asked Fives to come with them , Rex assured Fives that they were listening to him and that their only intention was to provide help . Nevertheless , Fives refused , claiming that Palpatine would kill him . Fives implicated the Supreme Chancellor in the conspiracy , an allegation that Skywalker refuted without a second ' s hesitation . At that moment , Commander Fox and a contingent of Coruscant Guard shock troopers stormed into the warehouse , having pinpointed Fives ' location via a probe droid . Although Fox ordered Fives to surrender , the rogue ARC trooper refused to do so and seized one of Rex ' s blaster pistols from the adjacent crate . Before Fives could fire his pilfered blaster , Fox shot first . Aghast , Rex and Skywalker watched from the inside of the ray shield as Fives collapsed to the floor , clutching at the lethal wound to his chest that Fox had inflicted . Once one of the shock troopers disabled the shield at Skywalker ' s behest , Rex rushed to Fives ' side , shouting that he needed a medic , but it was too late . Fives told Rex that the conspiracy was larger than anyone could have imagined , and his dying words made mention to a mission and nightmares that , for him , were finally over . Rex was devastated by the loss of his longtime comrade . All of Fox ' s Coruscant Guard troopers took off their helmets in honor of the fallen soldier . In the wake of Fives ' death , Palpatine ' s personal medical staff concluded via autopsies that the source of Tup ' s and Fives ' disturbing breakdowns had been a parasite native to Ringo Vinda , which had led to the deterioration of their inhibitor chips and , consequently , their volatile behavior . Unbeknownst to Rex and his comrades , the truth was just as Fives had said : Palpatine ' s explanation was a cover - up on the part of his alter ego , the Dark Lord of the Sith Darth Sidious , to mask an anti - Jedi directive that he and Count Dooku intended to execute via the clone troopers . Seizure of Scipio . When the Confederacy invaded the planet Scipio , the headquarters of the InterGalactic Banking Clan , the Republic Senate authorized a mercy mission to secure the bank s and prevent Count Dooku from wresting control of the entire galactic economy . Skywalker was appointed as the general in charge of the Republic fleet , joined by Rex and their men from the 501st . One of their primary objectives was to rescue Padmé Amidala , who had been on - world to recognize the inauguration of the Banking Clan ' s new leader , Rush Clovis , but had been trapped when the Separatists invaded and obliterated her Coruscant Guard security garrison . After their three - cruiser fleet reached the Scipio system , Rex , Skywalker , and their troops deployed from Skywalker ' s flagship in a squadron of LAAT / i gunships . En route to bypass the Separatist blockade , Rex used a datapad to review initial scans of the city that housed the Banking Clan ' s Main Vault and concluded that Amidala was there , still alive . Lieutenant Hawk and other pilots , flying clone Z - 95 starfighters , provided escort for Rex and the others to blast through the enemy droid starfighters and enter Scipio ' s atmosphere . Dooku thereafter withdrew his Confederate flotilla from the planet , abandoning his remaining droid forces stationed at the Main Vault . Upon arrival at one of the Main Vault ' s landing platforms , Rex stormed out of the gunship with Skywalker and their men and opened fire on the squads of Separatist troops in the vicinity , including droid commandos , B2 super battle droids , and Vulture droids in walking mode . Rex and Skywalker soon found what remained of Amidala ' s felled security garrison , including the corpse of the officer in charge of the detachment , Clone Commander Thorn , buried under several super battle droids . In the ensuing lightfight , Rex and his men accepted the task of occupying the droid infantry on the landing platform and also provided covering fire for Skywalker , who pressed past the enemy forces and into the city to retrieve Amidala on his own . Skywalker reached Clovis ' s office and freed Amidala from Separatist custody there , but after a careening Vulture droid crashed into the spire atop of which the office was situated , Clovis sacrificed himself so that Skywalker could pull Amidala to safety . Following the Republic ' s triumphant seizure of Scipio , the remnants of the Banking Clan leadership blamed the late Clovis for the incident and conceded command of the banks to the Office of the Supreme Chancellor , transferring full economic power to Palpatine . When Master Yoda made a later visit to the Sith homeworld of Korriban , known at that time as Moraband , the Sith Lords Darth Sidious and Darth Tyranus — the latter being Dooku ' s alter ego — engaged in an ancient ritual as a means of turning Yoda to the dark side . In the vision that Sidious and Tyranus concocted , Yoda found himself in a gunship with Rex , Skywalker , and a squad of four 501st troopers . The manifestation of Rex reported to that of Skywalker that they had detected a rogue shuttle slipping through Coruscant ' s security grid and that Dooku had been aboard the craft . Rex also revealed that , according to their scans of an industrial sector on Coruscant , Dooku was meeting with a second person inside of the LiMerge Building , to where their gunship was headed . Though at first disoriented , Yoda ordered the mission to proceed . Since Dooku was allegedly meeting with his Sith Master , Yoda believed it was imperative that they capture or else execute both Sith Lords . Upon touching down inside the building , Rex led the charge into the tower and sighted the two Sith Lords huddled over an altar basin , ordering his men to be wary of additional enemies . At Skywalker ' s word , Rex and his troopers opened fire on the Sith , but Tyranus reached out with tendrils of Force lightning to incapacitate Rex and his soldiers . Yoda ' s vision on Korriban ended after he sacrificed himself to defeat the hooded apparition of Sidious , with Sidious and Tyranus ultimately failing to break Yoda ' s spirit . War ' s end . As the Republic targeted remote Separatist strongholds in a campaign that was termed the Outer Rim Sieges , Republic forces tracked Nute Gunray to Cato Neimoidia , where he sought to retrieve some possessions from a citadel that he owned on the purse world . In response , Rex joined Skywalker , Kenobi , and Cody in an assault on Gunray ' s citadel in an effort to detain the elusive viceroy . Though Gunray escaped , the Republic forces captured his mechno - chair , which proved to be a valuable asset in unearthing the identity of Darth Sidious . Eventually , Rex relinquished his command of the 501st Legion , and the newly promoted Commander Appo assumed his leadership position . As a result , it was Appo and not Rex who oversaw the 501st through the end of the Clone Wars and into the time of the first Galactic Empire , the product of Palpatine ' s reorganization of the Republic . Personality and traits . Leader from the front . Gruff , no - nonsense , and tough as carbonite nails , the elite CT - 7567 was an aggressive and battle - scarred veteran of the Clone Wars . Hardened by countless engagements with the Confederacy of Independent Systems , Rex — as he chose to be named — retained a reputation as one of the best and toughest clone troopers in the galaxy , particularly due to his near - flawless military record . Freethinking , fearless , and resilient , he preferred to be more diplomatic than the headstrong Advanced Recon Commandos when it came to operating with his superiors , though he would not hesitate to give higher - ranking Jedi officers his blunt opinion . He regarded his assignments with the utmost priority , and true to his genetic engineering , he often put them before his own safety , recognizing the importance of doing his part to ensure an objective ' s completion . A cunning warrior who was versed in military strategy , Rex led from the front and , in some cases , would have fought ahead of his Jedi General , Anakin Skywalker . Far from being reckless , his courage and willingness to jump into the fray helped the Republic win numerous victories . His outspokenness and aggression notwithstanding , he held that it was a soldier ' s duty to follow orders , faithfully executing them even when he disagreed , with little concern for his own well - being . Although he was willing to lay down his life for victory if need be , he came to acknowledge that in some cases , soldiers had to make their own decisions . Brave and selfless , Rex was resolute in his dedication to his comrades . He recognized the need for galactic order and believed that the war was crucial to preserve the civilization that the Republic safeguarded . In spite of sometimes disagreeing with the management of the Republic ' s war effort by the Jedi High Council and the Galactic Senate , he remained committed in his service to the Republic . While on the war ' s front lines , he often became concerned for the safety of his Jedi officers , particularly for Skywalker , Ahsoka Tano , and Obi - Wan Kenobi . As such , Rex was hesitant to follow orders that put the Jedi in danger , especially those that came from the Jedi themselves , and was willing to sacrifice his life for the Jedi . He came to regard his clone brethren as his home and family , and he never forgot the many brothers whom he had lost to the war . His first loss of a unit , Torrent Company , at the Battle of Teth hardened him even further , and that he survived the ordeal was visible in his character from then on . During that campaign , Rex did not waver in his commitment to the mission , in spite of the possibility that the battle could be his last . While leading a squad of rookie soldiers against a full Separatist detachment for control of Rishi Station , he disregarded the odds against him , focusing only on his objective to retake the Republic base . Despite witnessing enough of his comrades die to know that there was nothing glorious about war , Rex was unafraid to do his duty as a soldier of the Republic , even if it meant placing his own life and those of his troops in jeopardy . He made tough decisions calmly , would never back down from a fight , and was willing to fight to the last man if necessary ; during the Second Battle of Geonosis , he even denounced a retreat as a cowardly tactic . Toughness aside , he viewed military service as an honor and greatly cared for the troops under his command , refusing to leave anyone behind if at all possible . He held the Separatist battle droids in contempt for all the damage that they had wrought on both him and his clone brethren , and cutting through droids on the battlefield frequently became an outlet for his rage and a way to avenge his fallen brothers . Despite his enmity with the Separatists , he assiduously lived by rules of engagement that transcended unwarranted behavior , regardless of provocation . After the loss of troopers Vere and Ince during a rescue mission , Rex pushed his anger to one side so that it would serve as fuel for the job at hand , intending to surrender to his feelings when in private . Sometimes , he even saw death as a method to assuage his belief that he had failed his men and to stop wondering how many more of them he would lose the next day . Yet he never gave up , watching over his troops throughout the pan - galactic conflict . Rex ' s care for his rookie 501st troopers on JanFathal was so substantial that he was surprised that his first instinct was not to look after Tano , whom he usually guided and mentored , but instead to take care of his men . Individualism and beliefs . A seasoned soldier born to fight for the Republic , Rex was not often given to softness or sentimentality of any kind . He possessed an unusual individualism as a clone trooper , encouraged early on in his career during his participation in Alpha - 17 ' s ARC training program . Though Rex took on a unique nickname , he opted to keep its origins to himself . Unlike most clone troopers , he even kept the name ' s origins private from his Jedi commanders . According to Skywalker , he was wound very tight as a rookie soldier , eager to carry out orders to the letter , but became less stiff as time progressed . He made a habit of reviewing mission parameters and objectives in his head prior to an operation , a trait that he shared with much of his clone brethren , since it had been drilled into them thousands of times during training on Kamino . He did not allow himself to be intimidated by his enemies , from battle droids to Dark Jedi like Asajj Ventress , though he did — at rare moments — acknowledge being afraid . Although he recognized that fear was necessary to understand the severity of a situation , he refused to let such feelings prevent him from doing his job . He even expressed humor in the direst situations , such as during the Battles of Christophsis and Teth , as he believed that humor had many uses . In some ways , he could not imagine how the Republic had survived in antebellum times , without himself and his clone brethren in the Grand Army providing support and security . Rex relied on instinct , sometimes preferring to shoot first without bothering to ask questions . Like many clone troopers , he regarded his homeworld of Kamino with a degree of personal importance . As such , he fought proudly alongside Commander Cody and their brethren to repel a Confederate invasion of Kamino , even rallying a group of young clone cadets to join the fight for their homeworld . Rex did not always look to a soldier ' s rank for information and instead judged by experience , which outranked everything in his system of beliefs , even the seniority of his superiors . When addressing the rookie soldiers of Rishi Station , he used the derogatory " shinie " slang to underline their inexperience in combat . He was pleased when the rookies rose to the challenge and acquitted themselves well in their first battle ; he placed a handprint of Rishi eel blood on Echo ' s armor to recognize the trooper ' s transition to a seasoned warrior , and he also honored Hevy ' s ultimate sacrifice to destroy Rishi Station . He and Cody succeeded in sharpening the rookie clones into an effective fighting force . Rex inducted both Echo and Fives into the 501st Legion for their valiant service , and he later promoted them to Advanced Recon Commandos for their courage and determination during the defense of Kamino . Rex even saw a bit of himself in the two troopers . A disciplined captain , Rex was good at preserving a stoical front around his troops when facing setbacks . Even when deeply unsettled about the comm jammer situation at Kothlis , he was careful to maintain a focused outward attitude , to the point that Skywalker could only sense his unease through the Force . Although Rex was not easy to rattle , he was visibly startled when he overheard trooper Checkers complimenting his skills as an officer , and he snapped at Tano and Checkers to " stow the chatter " after that comment . As a commanding officer , Rex was efficient and thoughtful , and his decisions and conduct reflected his assiduity . He often stayed focused on the current situation by keeping himself busy , which he found easy to do on account of his countless day - to - day tasks as a soldier . He knew that over - preparation never hurt and kept his men ready for battle at all times . Opting for maximum situational awareness on the battlefield , Rex was not partial to the Republic ' s spacegoing navy . He preferred to have ground under his boots whenever possible , where he could use his natural senses to take in the environment around him , free of a starship ' s viewports . Even so , he learned to respect the willingness of civilian starship contractors to live or die by their workmanship ' s quality , since such workers often went space - side with assault craft in the war zone . He fell back on old - fashioned soldering whenever necessary , using hand signals to convey orders depending on the situation . Rex learned what he could from the Republic ' s HoloNet News information bulletins , being used to absorbing information in that manner from his early Kaminoan flash training . He sometimes made judgments based on the contents of his training ; for example , he respected diplomacy as a kind of fighting for which he lacked training . On the other hand , he saw fighting simply as a skill in which he was versed , not claiming to absolutely like it . Unlike some other officers in the Grand Army , he respected malformed clones like 99 , whose strong spirit earned his admiration , and was greatly saddened when 99 died during the Battle of Kamino . Some of Rex ' s views were less open - minded , particularly as he encountered different cultures on his tour of duty . At times he did not pay much attention to history or culture ; he initially could not understand the Lurmen of Maridun and their pacifistic choice to avoid fighting , attributing such behavior to a lack of pride . He also looked down on the Lorrdian militiamen during the battle for Ereesus , though he learned to trust and respect their aptitude for kinetic communication . When it was too late for the Lorrdians to return to their own base , he welcomed them to bunk with his own men . The experience additionally led him to form a close working relationship with one of the Lorrdian officers , Sollaw ap - Orwien . On Onderon , Rex embraced his leadership role in training the local rebels , treating them as he would the troops under his command . He did not hesitate to push them , impelling them to perform maneuvers like the soldiers they strove to become . When the time came to leave Onderon , Rex was impressed with the rebels ' efforts . Rex was tan - skinned and stood 1 . 83 meters tall , weighing eighty kilograms . He was versed in Galactic Basic Standard , the primary language of the Republic . Due to his naturally accelerated age , he was ten years old by the time of the Battle of Christophsis in 22 BBY , though his physical development was that of an older Human man . He paid considerable attention to his hairstyle , as he found hair under a helmet to be bothersome and annoying . As such , he regularly kept his naturally black hair shaved to a fine polish to prevent it from interfering with his concentration on the battlefield . Even so , he dyed his hair a light blond , his most obvious unique trait , and let it grow out to a certain extent on various occasions . He experimented with other hairstyles as well , briefly dying his hair blue after choosing to support the Bylluran Athletic bolo - ball team when it reached the finals . However , he eventually deemed his new hairstyle undignified and inappropriate for a commanding officer , and he shaved it off to better fit in with his black - haired troops . Rex had a small scar beneath his lower lip . He sometimes bared his allegedly perfect teeth in a feral smile when adrenalized for a coming engagement with the Separatists . Effective commander . A well - respected clone trooper captain , Rex viewed military service as an honor and acquitted himself as the leader of the 501st Legion . He projected an air of authority to his troops and earned their respect and obedience in that fashion . Leading by example , he saw the importance of being confident on the battlefield and motivating his men to fight for victory . To him , honor and service were the hallmarks of being a clone trooper . He trusted the men under his command and was a role model to them . He remained determined to achieve success in the face of danger , from frequently overwhelming enemy numbers to the life - threatening Blue Shadow Virus . Though he staked his life by the chain of command and did his best to honor superiors ' orders , he also came to recognize the importance of a soldier ' s independence : He questioned orders instead of mindlessly obeying them and would adapt to shifting situations and plans as required . Rex had several manners of etiquette as a commander that he strictly observed . He made a conscious effort to spend time getting to know all of his men on a personal level , and he consequently despised using the inconsiderate tally sensor to remember his charges ' names because it was an admission that he could not tell his men apart from one another . He also valued his troops ' privacy while not in combat . During the JanFathal operation , after the five rookie clones under his command opened up their own comlink channel , Rex avoided intruding on their conversation , even if they were cursing him for the recent loss of trooper Vere , and would have only overrode the frequency in an emergency . Outside of life - or - death situations , he abstained from barking out orders to his subordinates or superiors , believing that such conduct was improper . In the absence of orders from superiors , Rex took matters into his own hands to ensure the survival of himself and his men . Despite generally being cautious and acting on certainty instead of hunches , he realized that in some situations there were no other options besides guesswork and improvisation . He was loyal to his men and genuinely cared for their well - being , for which he earned their admiration . All of Rex ' s traits in leadership were a testament to his effectiveness as a military leader , which was noticed by many of his colleagues , from troopers Checkers and Tup to Jedi General Pong Krell . Rex was well aware of his own talents as a leader and did his best to use them for the betterment of his men . His leadership skills were put to the ultimate test during the Battle of Umbara , where he was forced to balance the well - being of his troops with his commanding officer ' s strict orders . During that campaign , Rex found difficulty with uniting the 501st Legion under interim General Krell ' s leadership . Krell was focused on completing his mandates regardless of the cost , and he frequently employed strategies that the 501st perceived as reckless and costly . Though not afraid to speak out when he believed that he and his men were being treated inhumanely , Rex kept his men focused on their objectives and tried to set an example for his charges . He made an effort to respectfully cooperate with Krell despite the Jedi General ' s disagreeable behavior toward the clones . Rex was tenacious in safeguarding his men ' s lives , even if that meant deviating from Krell ' s often reckless plans . At times he had more faith in his men than Krell did , trusting that Fives and Hardcase would be able to co - opt Umbaran starfighters from the nearby airbase — unlike Krell , who threatened to relieve Rex of his rank should he stray from the original assault plan . Rex was receptive to his subordinates ' concerns and welfare in ways that Krell was not , requesting a respite for the battalion after a twelve - hour overland march . Whereas Krell simply activated one of his lightsabers to silence dissenters , Rex listened to his soldiers ' grievances even when he did not agree , such as during their preparations to seize the Umbaran airbase . As time went on , he grew more open to defying Krell ' s orders in order to preserve his men ' s lives . After Fives , Jesse , and Hardcase refused to abandon their plan to eliminate the orbital Separatist supply ship , even though Krell had outright rejected their proposal , Rex did not attempt to restrain the three soldiers from leaving , but he also made it clear that he would not be able to save them from Krell ' s wrath once they were caught . Nevertheless , Rex covered up the trio ' s departure from Krell and also prevented Dogma and Tup from reporting their insubordination to Krell . As the dissenting trio ' s commanding officer , Rex displayed a measure of responsibility for his subordinates ' exploits , even though the decision to disobey orders had been theirs and not his . When Fives and Jesse returned , Rex tried to take the full blame and punishment for their actions , claiming that he had ordered them to disregard Krell ' s decree , though Fives returned the gesture by honorably reporting the truth of their disobedience to Krell . In the end , Rex ' s concern for his troops ' welfare outshone his adherence to Krell ' s authority : He openly disobeyed Krell ' s subsequent orders to execute Fives and Jesse . He knew that if such punishment was rendered even once , then all of the 501st Legion could eventually face a similar demise , and he refused to let his men be subjected to fear of execution . He was horrified when Krell manipulated the 501st into attacking fellow clone troopers from the 212th Attack Battalion ; the incident instilled in him the need for justice to prevent a recurrence of such an atrocity . He thus resolved to lead his men into the " uncharted territory " of arresting Krell for treason against the Republic . Given the mutinous nature of his proposal , Rex knew that he could not force his men into participating and gave them the option to opt out , though all of them except for Dogma supported his decision . For the entirety of the episode , Rex persevered in his commitment to his men , for whose safety he sought to detain Krell . War of loyalties . During the war , Rex swore to protect all Republic citizens from harm , including the ill - advised Chairman Chi Cho . At the Battle of Orto Plutonia , Rex knew that his men were risking their lives because of Cho ' s foolishness , but he nevertheless respected Cho ' s authority . Yet for all his wartime service , Rex ' s challenges were not only posed by his enemies . His loyalties and resolve were tested multiple times simply from his battlefield career . While he was aware that he and his clone brothers had been bred to fight for the Republic without a choice , he made the best of the situation . He knew that the politics and ideology of fighting were beyond his influence and instead focused on the day - to - day activities of looking out for his brothers in arms . When it came down to the nature of his commitment , it was not his relentless Kaminoan training or his loyalty to the Republic , but his dedication to his soldiers and Jedi officers that kept him in service . His compassion and selflessness as a commander was evidenced at Kothlis when , despite being severely injured , his first concern was for the welfare of his troops and comrades , not his own . His loyalty was so potent that even if he had not been born to serve , he could not imagine the prospect of abandoning his brothers and friends . Over time , Rex learned to cope with his doubts about his origins as a clone trooper . Whenever the morality behind his manufactured birth was tested and his indoctrinated loyalty to the Jedi and the Republic challenged , he recalled that the men under his command depended on him to lead them — and that he would never be able to fight for the Republic if he questioned or scrutinized his birth ' s ethics . In that way , Rex put aside his insecurities for the greater good of the Republic . His strong loyalty to the Republic and the Jedi came into stark contrast with Sergeant Slick ' s hatred of the Jedi and betrayal of his comrades during the Battle of Christophsis . Rex had no respect for traitors like Slick and was visibly unsettled with Slick ' s perspective that the clone troopers were slaves to their Jedi commanders . Despite Slick ' s claim that he had been striking a blow for all clones , Rex drew the conclusion that the sergeant ' s actions — particularly putting his brothers ' lives at risk by performing espionage for the Separatists — evidenced that he did not love and care for them as he so believed . Rex ' s commitment to the Republic remained undeterred during his later encounter with the clone deserter Cut Lawquane , who had left the Grand Army relatively early on in the war . After first meeting Lawquane , Rex displayed a lack of patience for those who would abandon their duty , and he made his contempt for the deserter known . Once he had assumed a more respectful attitude toward Lawquane , Rex maintained that his beliefs had not been programmed into him , as Lawquane suggested , and that they were undeniably his own . He believed that his military service made him part of the most pivotal moment in the Republic ' s history and that the Grand Army ' s failure to defeat the Confederacy would mean the insurrection of an inconceivable evil . Despite disagreeing with Lawquane ' s outlook and disapproval of the war , Rex came to respect Lawquane as possessing a different type of loyalty — not to the Republic , but to his adopted family . Adding to his grudging but sincere regard for Lawquane was the deserter ' s brave effort to safeguard his family from invading droid commandos . When the time came to end his stay with Lawquane ' s family , Rex forwent his initial adamancy on turning in the fugitive Lawquane , opting not to report him as a deserter . He concluded that Lawquane was certainly not a coward and , before departing , politely refused his offer of a place at his farm . As the Clone Wars continued , Rex feared that the Republic was beginning to view the clone troopers as a deindividualized , disposable army . He nevertheless upheld the mindset that the clone troopers ' responsibility was to carry out and die for their missions when necessary . As he argued with Fives during the Battle of Umbara , that belief stemmed from his own code , not from the Kaminoans engineering him to think as such . In spite of his doubts about the clones ' place in the Republic , he preserved his belief in the system for which he and his men were fighting . He held that the clone troopers were not independent of one another , that they were part of something larger than themselves , and it was thus not up to them to disobey orders in favor of strategies that they deemed more effective . Yet he was forced to draw the line when his loyalty to orders required that he see out General Pong Krell ' s decree to execute troopers Fives and Jesse for insubordination . Rex consequently realized that in some cases , it was necessary to make one ' s own decisions instead of blindly following orders like battle droids . Although he retained his loyalty to the Republic despite the incident with Krell , the Battle of Umbara left a lasting impression on his outlook as a clone trooper . In the face of so many casualties , he questioned the point of the war and wondered what would happen to the clones when the conflict ended , when they would no longer be needed as soldiers to fight the Clone Wars . Steadfast soldier . During the war , Rex became acquainted with a number of his brethren . He was good friends with Commander Cody , their friendship stemming from their mutual ARC training under Alpha - 17 . Their close relationship mirrored that of Skywalker and Kenobi — Rex ' s impulsiveness and superb instincts in battle won Cody ' s admiration , though Cody often worried that he put too much faith in them and rushed into danger too frequently . Still , Cody ' s penchant for procedure tempered Rex ' s impulsiveness , making them a good fit . After Rex fought alongside Sergeant Boomer countless times , Boomer became one of his trusted allies and close friends , as did Sergeant Coric of Torrent Company and Advanced Recon Commando Fives . Rex also shared an acquaintance with Commander Ponds and came to rely on fellow 501st trooper Denal for his instincts and expertise in combat . Aboard Captain Gilad Pellaeon ' s " Leveler " , Rex found that he was comfortable with others who understood him as a fellow soldier , as opposed to Coruscant civilians who never would . Pellaeon described Rex as a solid , sensible chap who told very good jokes when not being the obedient soldier around Skywalker . Cody admired Rex as a smart man , and Kenobi believed he always thought on his feet . Tup held his leadership in high regard , and Checkers saw him as one of the Republic ' s best commanding officers . Callista Masana interpreted Rex as a hands - on commander who did not want to look like he was letting others do the dirty work by not taking part in the reconnaissance of JanFathal ' s capital of Athar . Serving under Skywalker . Serving closely with Skywalker throughout the Clone Wars , Rex absorbed much from the Jedi General ' s style of leadership and daring improvisation . He learned to think on his feet , to consider methods outside of the regulation manuals , and to never surrender or let seemingly overwhelming odds dissuade him on the battlefield . He adopted Skywalker ' s inclination for unorthodox combat tactics , which often yielded spectacular results against the enemy . Rex was as headstrong and as brave as Skywalker , with full confidence in his own abilities , and it was the duo ' s similar lack of " by - the - book " methods that made them such an excellent team . He shared Skywalker ' s aggression , free thought , and occasional recklessness — a combination that got them both in and out of trouble . From his service with Jedi officers on the war front , Rex regarded them as figures of authority and learned to both respect and never doubt their resolve or powers . In turn , the Republic ' s Jedi Generals came to rely on him on the front lines , and his performance as an honorable military leader effected him becoming well - respected by Jedi officers and clone troopers alike . However , he sometimes disapproved of the preference to debating over fighting that some Jedi possessed . On the other hand , Skywalker matched Rex in bravery , aggression , and decisiveness , and the general ' s " soldiery " traits helped Rex to form something of a friendship with him . Rex worked closely with Skywalker on the battlefield , offering thought - out suggestions about strategy as he saw fit , and respected Skywalker because he put himself on the line with his troops . Even though Skywalker at times maintained an authoritative demeanor of command , Rex did not resent such conduct on his part , knowing that respecting the chain of command was an integral component of an officer ' s performance . Like the rest of the 501st ' s Torrent Company , he was truly devoted to Skywalker and was proud of the trust that his general invested in him . Skywalker in turn thought highly of Rex , believing him to be the finest and most loyal trooper with whom he had worked , and introduced him as such to General Pong Krell . As a soldier , Rex was loyal to Skywalker not only on the battlefield , but also on a personal level . When Skywalker was away during " Leveler " shakedown cruise , Rex kept him regularly apprised with the situation to prevent his general from being caught out of the loop . In addition , when Skywalker pursued fugitives Rako Hardeen , Cad Bane , and Moralo Eval to Nal Hutta without the consent of the Jedi High Council , Rex made an effort to conceal his general ' s unauthorized undertaking from Mace Windu . Rex was not upset when Skywalker was unable to aid Torrent Company during the Battle of Teth . True to his belief that the mission always came first , he understood his general ' s mandate to return Rotta the Huttlet to Tatooine . Furthermore , he looked up to Skywalker as a role model ; when serving away from his general , he would sometimes consider , as he did more than once during the battle on Ereesus , what Skywalker would have done in his position to ensure success . The time that Rex spent with Skywalker was such that he even became aware that his general had feelings for Senator Padmé Amidala , though he was unaware of the full extent of their attachment . On some occasions , he pitied Skywalker , who was often prone to guilt and regret when forced to prioritize other assignments over serving alongside his captain . He became used to Skywalker ' s personal style of command and worked well with his Jedi General . Besides his friendship with Skywalker , Rex was acquainted with Obi - Wan Kenobi , Skywalker ' s own former Master . Rex made it a goal to procure a laugh from Kenobi on the battlefield with his sarcastic jokes , though he did not have much success . In spite of his respect for his Jedi officers , Rex did not share all of their beliefs , particularly regarding the Jedi Code . Whereas Kenobi restrained himself from taking the life of the unarmed Keeper Agruss despite the Zygerrian ' s crimes as a slaver , Rex had no such reservations and acted decisively , killing the keeper . Rex also came to fully trust R2 - D2 , Skywalker ' s personal astromech droid . Mentor to Ahsoka Tano . After meeting Ahsoka Tano on Christophsis , Rex admired her spirit , though he was concerned with her initial naivety and arrogance toward her commanders , particularly Skywalker . Once the captain and Padawan reached an understanding of each other , they began to form a strong bond and supported each other as the galaxy - shaking war progressed . Rex often addressed Tano as " kid " in lieu of a more formal title . As Tano ' s teacher in military matters when Skywalker was absent , Rex preferred to train by example , and it was in that manner that he often instructed Tano . Among his lessons for her was that smart remarks were unhelpful and disruptive in times of protocol , especially when they were directed at her Master . They came to respect each other , and he earned her trust with her life . He defended her proficiency from others who expressed hesitancy with her competence , including fellow officers like Gilad Pellaeon and Wilhuff Tarkin . In addition , Rex encouraged Skywalker himself to maintain his faith in his Padawan during a confrontation with Asajj Ventress on Taronda . Rex ' s attitude toward Tano was such that Skywalker came to trust him with her , and Skywalker additionally recognized that some of the Padawan ' s lessons were better learned from the captain instead of himself . Rex helped Tano through several tough situations , including on Maridun , where their team was forced to find medical attention for a grievously wounded Skywalker , and at JanFathal , when their encounter with the Altisian Jedi challenged her beliefs in the Jedi Code . Rex also guided Tano in her first command position at Ryloth , even though she expressed insecurity with the role . Although he was skilled in strategy and carefully identified the obstacles that hindered Tano ' s plan to break the Separatist blockade of Ryloth , he remained respectful toward her and did not outright criticize her proposed tactic . He mentored her in leadership as time went on , instilling in her the importance of inspiring one ' s troops and leading by example on the battlefield , no matter the situation . On occasions when Tano was unable to voice her full concerns to him because of security or protocol surrounding certain assignments , Rex fully understood the reasons behind her withholding of confidential information , and he did not take it personally . Although in some cases he knew when she was concealing her fears from him , including those about her Master ' s life , he did not criticize her for being afraid ; instead , he supported her in what ways he could . During the search for the fugitive Tano at the Republic military base , Rex refused to believe that she had slaughtered three clone troopers while escaping , even though the lightsaber cuts on the corpses indicated that she was responsible . Nevertheless , he was forced to set aside his personal beliefs in favor of the evidence at hand , stating in a following all - points bulletin that Tano had killed the three soldiers . Rex ' s instincts were later upheld when it was revealed that Barriss Offee had committed all the crimes for which Tano had been accused . The trouble with Krell . By the time of the Battle of Umbara , Rex had become used to Skywalker ' s more personal style of command . He thus came into conflict with the 501st Legion ' s interim Jedi General on Umbara , Pong Krell , a hard leader who strictly adhered to the chain of command . Rex initially respected Krell for his impressive military record , but he found that Krell was difficult to work with because of his apparent lack of regard for clone troopers — Krell preferred to address them by their numerical designations instead of their individually chosen names , with which Rex took issue . Although he did his best to cooperate with Krell , he found that the Jedi Master rarely responded positively to suggestions as Skywalker did . Furthermore , he frequently viewed Krell ' s methods as flawed and reckless , since they often involved head - on assaults with high casualties . Even after Krell forced an uncooperative Fives to stand down by igniting his lightsaber , Rex firmly stood his ground against the Jedi General . He defended his troops ' well - being and removed his helmet to speak to Krell face - to - face , asserting that the clones were men rather than faceless , rank - and - file soldiers . Though his tenacity and loyalty to his subordinates won Krell ' s respect , Rex still failed to see eye - to - eye with Krell as the Umbara campaign continued . Over time , Rex became more willing to disobey Krell ' s orders . During the battle to reach the Umbaran airbase , Rex developed a secondary plan to have Fives and Hardcase seize two starfighters from the enemy outpost to use against the Umbaran mobile heavy cannons . Though Krell did not approve of his strategy and even threatened to relieve him of duty for insubordination , Rex allowed Fives and Hardcase to carry out their stealth incursion . When Krell claimed that Rex had yet to understand that copious casualties were the price of victory , the captain ' s respect for Krell waned , and he agreed with Fives that it was Krell who would never understand the clones ' sacrifices . After Fives , Hardcase , and Jesse slipped away on their illegal plan to target the Separatist supply ship in orbit of Umbara , Rex covered for them during their absence . He outright lied to Krell , providing a fake cover story that he had authorized the trio ' s use of the locked - down Umbaran starfighters and kept the Jedi General in the dark about the nature of their departure . Ultimately , he overtly defied Krell ' s orders to execute Jesse and Fives for their insubordination , and his respect for Krell eroded even further as he refused to be intimidated by the general ' s threats for retribution . Rex began to question Krell ' s authority as well as his sanity , even suspecting that the Jedi Master had betrayed the Republic , and his suspicions were proven correct when the general turned the clone troopers against one another on the battlefield . He was appalled at Krell ' s crimes against his soldiers , especially since Krell was a Jedi Master . From that point onward , he resolved to treat Krell as a traitor , risking charges of mutiny to arrest the Jedi General for treason against the Republic . Rex deplored Krell ' s fall from the ideals of the Republic and his quest to become Count Dooku ' s new apprentice . With the imminent danger of the Umbaran militia advancing on the airfield , Rex reluctantly agreed with Fives , Jesse , and Tup that Krell needed to be executed before he could convey the Republic intelligence in his possession to the Confederacy . When about to shoot Krell , Rex remained undeterred by his taunts about being in a position of power . Yet for all the casualties that Krell had caused , Rex was unwilling to pull the trigger on an unarmed Jedi , and Dogma instead terminated Krell . Skills and abilities . Rex ' s gifts in critical thinking and leading his brethren into battle reached the attention of the Kaminoan cloners , and he thus underwent command training and intensive programmed learning on Kamino . Further ARC training under Alpha - 17 sharpened him into a cunning and lethal soldier . As an expert in multiple forms of combat , Rex was skilled in armed and unarmed fighting . He was knowledgeable in the use of a jetpack , taking squads through the most difficult of flight paths . He was additionally well - versed in reconnaissance and military tactics and was capable of leading specialty clone trooper units in various operations when the need arose . His abilities were such that he came to be considered one of the best soldiers in the Grand Army . Rex valued being an accurate shot with a blaster and became proficient in marksmanship . He was able to hit both fast - moving targets — such as a flying fuel cell on Skytop Station or a Single Trooper Aerial Platform on Lola Sayu — and distanced marks alike , eliminating a gun emplacement on Geonosis from several hundred meters away . Like any good soldier , Rex knew his weapons and swore by his armor and gear , but he also recognized that equipment alone could not win a battle — a soldier ' s greatest tool was his mind . Relying on intelligence over weaponry , he combined a commando ' s gift of improvisation with the toughness of an infantryman . Having been trained to resist interrogation as a prisoner of war , he was adept in mental resistance and was able to shield himself from a Force mind trick performed by the Dark Acolyte Asajj Ventress , due in part to his strong will and focus . He was relentless in using his abilities and equipment against his adversaries , whether they were Separatist droids on Ryloth or aggressive Talz warriors on Orto Plutonia , the latter of whom he faced with steely determination . He had a fast reaction time even when not in combat : He responded instantly with his blaster to the appearance of a Rishi eel on the Rishi moon , killing the predator with a single shot to the eye . He recognized the danger of hesitating in battle , even for a split second , and resolved to eliminate all of the enemies in his path before they could gain the upper hand . As Skywalker noted during the Battle of Christophsis , he did so without even having to think about his maneuvers . Rex was able to hold his own against the larger units within the Separatist Droid Army , including octuptarra magna tri - droids and heavily armed Vulture droid starfighters . Though he dreaded the latter the most of all of the Separatists ' combat droid models , he stood his ground against them . He was quite strong and was able to lift the injured Chairman Chi Cho without aid . He was also able to escape defeat at the hands of a menacing assassin probe aboard the " Coronet " by grabbing the attacking droid ' s pincers before they impaled him ; he then managed to kick the large droid off himself . Against ruthless winds and menacing electro - mines on Lola Sayu , he was able to free - climb the cliff to an entry point to the Citadel . Despite having a temporarily paralyzed arm during the Battle of Saleucami , Rex was able to roll and fight in blaster combat against several droid commandos . Equipment . Phase I armor and weaponry . During the first months of the war , Rex used a suit of plastoid Phase I clone trooper armor that was customized with the white and blue of the 501st Legion . His polarized T - visor helmet sported Mandalorian " Jaig " eyes as battle honors and was equipped with a fold - down rangefinder scope that included a night vision filter . For supplemental head gear , he used a visor with an inbuilt telemetry system and a pair of removable spot lamps that boasted a viewing range of forty feet . His helmet systems included infrared vision ; an array of sensors ; an internal comlink ; visual and auditory buffers ; and a heads - up display with thermal imaging and biosign indicators . To complement his body armor , Rex sported a traditional " kama " half kilt , constructed out of leather and thick anti - blast armor , to repel low - flying shrapnel and debris . He also wore over his left shoulder a semi - blue pauldron armor plate , which was reserved for clone officers . It was punctured through the chest plate by an enemy droid sniper during the Battle of Saleucami . Besides boots with magnetic gripsoles , Rex used a variety of other tools : a vibroblade in one of his gauntlets ; a wrist comlink for his left gauntlet ; a medpac and high - calorie dry rations in his utility belt ; and a rappel line with a winch control motor for climbing during combat . His armor suit had an airtight seal and a limited oxygen supply , which allowed him to survive in the vacuum of space for brief intervals , such as during the Battle of Devaron . For some operations , he wore standard - issue white clone trooper armor . While on Orto Plutonia , he donned cold - weather armor — including a thermal suit and rebreather hood , the latter of which was decorated with his " Jaig " eyes — for protection from the cold . Although necessary for surviving Orto Plutonia ' s hazardous conditions , the extra gear dangerously limited his movements in battle . Being skilled in marksmanship , Rex never underestimated the capabilities of a good old - fashioned blaster and used a variety of weapons in combat . He preferred to wield a pair of DC - 17 hand blasters for their speed , a trait that he shared with the dual pistol – using Jango Fett , the bounty hunter from whom he was cloned . Rex cut his blasters ' holsters at his waist to be able to draw them more quickly . Although his two DC - 17s were his signature choice of weaponry , he sometimes used a DC - 15S or a DC - 15A blaster rifle . On JanFathal , he used a DC - 15 with a customized detonite grenade launcher attachment . He also used a grappling hook extension as required . As thanks for helping to contain the Blue Shadow Virus on Naboo , Rex received a set of modified DC - 17s from Theed Arms . The pistols , dubbed the " Vigilance " and " Negotiator , " were specially plated with metallic chromium , a prerogative of the Naboo royalty . When it came to heavy weaponry , Rex was capable with using missile launchers like the RPS - 6 rocket launcher , which he employed against enemy ground vehicles . Rex carried a set of electrobinoculars for expanding his viewing range on the battlefield . When the situation called for it , he used a JT - 12 jetpack and accompanying flight equipment , as he possessed expertise with the gear . He used a space combat propulsion pack to boost his jetpack ' s range for high elevations , for as far reaches as realspace . While away from the front lines , Rex made himself comfortable with black fatigues instead of his usual hefty armor . Transition to Phase II . When the Republic began to have its clone soldiers transition to the Phase II set of clone trooper armor , Rex did not particularly care for the new equipment , as he believed that it was prefabricated and too disposable . He did not immediately switch over to Phase II , but when he did , he developed his own unique version of Phase II armor , combining elements of his old Phase I suit and the latest Phase II technology into a hybrid of both armor sets . Salvaging the middle portion of his old Phase I helmet , including his rangefinder scope and original T - visor , he welded them together with the new Phase II helmet ' s upgraded breath filters and voice output annunciator . He did the same for portions of his chest plates , and the resulting weld marks became another of his armor suit ' s distinctions . Although Rex modified his helmet , he retained his " Jaig " eyes from his Phase I suit . Aside from a redesigned pauldron with an ammunition pack and an updated wrist comlink that he transferred to his right arm , he continued to use the rest of his Phase I equipment , including his " kama " , utility belt , removable spot lamps , and quick - draw blaster holsters . Though he still carried electrobinoculars , he began to use a polarized macrobinoculars attachment with his helmet . He even began to engrave tally marks into his helmet , gauntlet , and forearm and leg plates to record his growing number of kills . In addition , he started carrying an Imagecaster holoprojector . He used a JT - 12 jetpack with his Phase II armor as required , as well as a SCUBA trooper mask , decorated with his " Jaig " eyes and blue 501st markings , for underwater combat . For space - walking , he used breathmask survival gear , which consisted of a back - mounted pack with breathing tubes that connected to both of his helmet ' s breath filters . For the assignment of helping the Jedi train the Onderon rebels , Rex adopted a new suit of armor to avoid using his usual , distinguishable set of 501st white and blue . The result was a set of black fatigues with a limited amount of equipment , including a jetpack for the deployment into the Onderonian jungle . Although he chose a different helmet with a visor and goggles , he made sure to have a rangefinder for his helmet and also sported his " Jaig " eyes on his chest plate . Behind the scenes . Leading clone of " The Clone Wars " . The character of Captain Rex was created for the 2008 and , with his place in the spotlight turning him into a fan favorite among " Star Wars " enthusiasts of all ages . Prior to his debut in the television series , he was featured in February 2008 as a promotional mail - order figure that kicked off Hasbro ' s . After his " CC - 7567 " designation was attributed in his Databank entry on StarWars . com in May 2008 , Rex made his first appearance in " Star Wars " canon in " The Clone Wars " film ' s and , which were published on July 26 , 2008 . As the television series ' primary clone trooper character , Rex played a part throughout the series ' five broadcast seasons , which aired from October 2008 to March 2013 . He also appeared in several episodes of the series ' , which was released on Netflix in March 2014 . Voice actor Dee Bradley Baker provided Rex ' s voice , as well as those of all other clone troopers , throughout the television series . To make Rex distinctive , Baker portrayed him with a somewhat deeper voice than the other clone characters based on his confidence and aggression . Baker and Series Supervising Director Dave Filoni developed the idea that Rex was the central personality type of all clone characters , whom they all aspired to embody , while others had an excess of various traits . Baker ' s intended distinction for Rex was prominent during clone - centric episodes , such as " Rookies " and " The Hidden Enemy " from the , as well as " The Deserter " from the , all of which featured Rex as a lead character . The latter two episodes contrasted him with Sergeant Slick and Cut Lawquane , two clone characters who were shown to have abandoned their service to the Republic for different reasons . Rex ' s popularity and character development over time were such that Filoni voiced the production team ' s conscious effort to continue exploring his story within the series . In April 2011 , Filoni stated that the fates of Rex and Ahsoka Tano were the two storylines that he was the most intent on pursuing , given both characters ' inseparability and their absence from the chronologically later film . In the series ' , Rex was spotlighted in a four - part story arc , which focused on the Battle of Umbara in the episodes " Darkness on Umbara , " " The General , " " Plan of Dissent , " and " Carnage of Krell . " The episode arc evolved his character by bringing him into conflict with General Pong Krell , while also showcasing his performance as a leader . A heroic character in the television series , Rex has achieved considerable popularity with the " Star Wars " fan base , particularly with younger fans . In August 2010 , he was voted the thirty - sixth most popular character in " Star Wars " canon on IGN . com , beating Ahsoka Tano , who was ranked as forty - third most popular . In the " " 2014 " Reader Awards " contest , Rex — alongside Yoda — was a runner - up in the " Most Heroic Hero " category , which fans chose from the television series ' cast of characters ; the overall category winner was Obi - Wan Kenobi . Rex has also been included in StarWars . com ' s This Is Madness , an annual character popularity tournament imitating . In the 2013 bracket , he lost within the first round to Ahsoka Tano , but the 2014 bracket saw him reach the " Duel of the Eights " quarterfinal round , in which he lost to Han Solo . Development for the series . At first , the creators of " The Clone Wars " series planned to use Alpha - 17 , the Advanced Recon Commando featured throughout the " " comic book series , as the television series ' primary clone trooper character . Series Producer George Lucas objected to the selection of Alpha because his name would perpetuate too much of an alliteration between several main characters — Anakin , Ahsoka , Artoo / R2 - D2 , and now " Alpha " — hence , another clone trooper was created . Lucas provided the name " Rex , " securing the new character ' s role in " Star Wars " . Rex ' s chin scar was based on the blemish that actor Harrison Ford — who portrayed the smuggler Han Solo in the original trilogy of " Star Wars " films — made famous in the . Additionally , the Mandalorian " Jaig " eyes on Rex ' s armor helmet were derived from concept art for Boba Fett ' s helmet in the 1980 original trilogy film , as later released in " The Empire Strikes Back Sketchbook " . During production on the episodes for the fourth season ' s " Battle of Umbara " story arc , the series ' animation crew redesigned Rex ' s character model , incorporating the new Phase II clone trooper armor that had been gradually introduced for clone trooper characters since the advent of the fourth season . Director Dave Filoni developed the in - universe backstory for his unique " hybrid " armor — Rex kept old parts from his Phase I suit and welded them with the new Phase II gear — as another character trait for him , adding to his distinction and personality . Deleted scenes and cut storylines . Several brief scenes featuring Rex in two first season episodes — " Rising " Malevolence " " and " Storm Over Ryloth " — were cut from the final versions that were broadcast on Cartoon Network , but they were included in their Director ' s Cut editions in DVD collection , released in 2009 , which integrated them into " Star Wars " canon . Rex appears in one of several deleted scenes from the second season episode " Duchess of Mandalore . " In the scene , following the Galactic Senate ' s decision to abstain from occupying Mandalore , Rex seeks out Anakin Skywalker , who has been overseeing preparations for the Mandalore - bound fleet at a Coruscant staging area . After Rex informs him of the Senate vote , Skywalker is pleased to hear the news and has Rex relay the orders to stand down to the rest of the fleet . Although the scene was fully animated , it was cut from the final version of the episode as part of an abandoned story thread featuring Skywalker ' s military preparations for the Republic occupation of Mandalore . A deleted scene from the episode " ARC Troopers " has Rex lecturing troopers Echo and Fives in the " Resolute " hangar bay about their expectations to have already been promoted to Advanced Recon Commandos . While cut from the final version of the episode , it was included in the young - readers book " " adaptation of the episode , thus canonizing the scene . In Series Writer Matt Michnovetz ' s original script for the fourth season episode " Carnage of Krell , " Rex was to execute General Pong Krell for his crimes against the Republic , but Filoni decided that such a move would not be appropriate for his character . As a result , the role of Krell ' s executioner was given to rookie trooper Dogma . A cut storyline from the fourth season episode " The Box , " scripted by Brent Friedman , involved Skywalker searching for the bounty hunter Rako Hardeen , whom Obi - Wan Kenobi is posing as for an undercover operation . The Jedi High Council attempts to prevent Skywalker from discovering the real Hardeen , who is in their custody , but when Skywalker finds Rex transporting Hardeen off - world , the Council is forced to reveal the truth . The storyline was abandoned for time and clarity , as well as the unlikelihood of Rex keeping information of that measure of importance from his Jedi General . In a deleted scene from the episode " A War on Two Fronts , " Rex shows the Onderon rebels how to construct homemade EMP grenades by coiling a wire around a magnet , then adding a remote detonator . He demonstrates the device on a pair of captured B1 battle droids , with Skywalker , Kenobi , and Ahsoka Tano further explaining the advantages of such weaponry to the rebels . Another short deleted scene from a fifth season episode , " To Catch a Jedi , " has Rex accompanying Skywalker , Plo Koon , and a Coruscant Guard detail to Coruscant ' s Level 1313 , where Clone Commander Wolffe and his troopers are recovering from a failed attempt to capture a fugitive Tano and Asajj Ventress . In March 2013 , following the fifth season ' s finale , Lucasfilm announced that the television series would be ending . Since then , Friedman has indicated that there were more plans for Rex in future seasons . In a November 2013 interview with the Rebels Report podcast , Friedman described a story arc that he had scripted featuring Rex and R2 - D2 on a major adventure that would have been fun , as well as " dark in its own way . " The majority of the story was set on one of the moons of Ryloth . Friedman related the " personal hook " of the arc to the film " " , since Rex and R2 - D2 would have hijacked a super battle droid and would have become attached to it over time . The story arc , comprising four episodes , would have been released as part of an eighth season , though production for those episodes was never completed . Friedman stated that writing those episodes increased his appreciation for Rex as a character . Other material . Rex appeared extensively throughout supplementary material for the television series , including the series ' ; the of the ; the of the ; the written by authors Karen Traviss and Karen Miller ; and a number of young - reader books . He was also featured in the video game s " " and " " and was given a role in the non - canonical video game " " . Rex was featured in the " Clone Wars " and " Clone Wars Tactics " expansions of the Topps Company ' s " Star Wars PocketModel Trading Card Game " . From 2008 on , he was designed as an action figure for several sets of Hasbro ' s " The Clone Wars " toy line , and he was also made into a LEGO mini - figurine as part of various building sets . His minifigure was given a uniquely designed head piece , a distinction from other clone trooper figures . He was included in packs for the 2008 " The Clone Wars " and 2009 " Galaxy at War " expansion sets of Wizards of the Coast ' s " Star Wars Miniatures " series . August 2009 saw Gentle Giant Studios release a life - size monument of Rex , standing six feet tall . In 2010 , Rex became the face of " Star Wars " merchandise packaging as part of the new " Clone and Sky " design . PILOT , the design firm that developed the artwork , was initially reluctant to use Rex because of its original intention to allow the viewer to look into the eyes of the featured character ; Rex ' s helmet limited that emotional connection . To address that void , the background element of the " ominous " blue sky was added to imitate being on the front lines of the Clone Wars . The Rex " Clone and Sky " packaging lasted two years in " Star Wars " product marketing , with the Sith Lord Darth Maul replacing Rex as the featured face on " Star Wars " merchandise packaging in 2012 . For 2011 , Rex became immortalized as part of Sideshow Collectibles ' " Militaries of Star Wars " deluxe figure line . Rex appeared in the " " online video game , in which he was featured in several purchasable sets as well as in the game itself . He encouraged the player - character to play the " Galactic Forces " mini - game — previously for the " Blaster Training " mini - game before Clone Commander Stone replaced him in that role — and to enter combat battle zones , such as Ryloth and the " Battle of Umbara . " He was also featured in the tutorial levels for the " Card Assault " mini - game . Author Jason Fry briefly referenced Rex ' s role in the 501st Legion in " The Essential Guide to Warfare " , a third - generation published in April 2012 . Fry revealed in an interview that a story more prominently featuring Rex had to be cut from the final version of the book due to length constraints . Fry was later able to rework the omitted material as a short story , " Speaking Silently " , which was published in " Star Wars Insider " 139 in January 2013 . Inconsistencies . In June 2008 , initial merchandising material for the television series indicated that Rex was an Advanced Recon Commando , but that rank was not repeated in subsequent material and is therefore assumed to be an error . Furthermore , Rex was listed as a clone commander in " Star Wars Insider " 103 ' s " " , the " " , the Wizards of the Coast sourcebook " The Clone Wars Campaign Guide " , " " , " " , and the StarWars . com Encyclopedia entry for Saleucami , along with numerous issues of " The Official Star Wars Fact File " . Part 2 of the " Fact File " remake referred to Rex as a sergeant on one occasion , with the error being repeated in a revised issue . Yet in all other " Star Wars " material , Rex is portrayed as a clone captain , which this article reflects . Due to his rank as a captain , Rex ' s command over the 501st Legion lacks correlation with the Republic Grand Army ' s Order of Battle , as detailed in " Star Wars " Legends . Per " The Essential Guide to Warfare " , a clone captain is in command of a company , while a senior clone commander would command a legion like the 501st . Some source material correctly reflects the system : The 501st Legion ' s StarWars . com Databank entry stated that Rex led the core group of the 501st , while " The Clone Wars " novel series established him as the leader of Torrent Company , a 501st unit . Yet other publications — including " " and his StarWars . com Databank and Encyclopedia entries — simplified his role to the overall leader of the 501st , subordinate only to Anakin Skywalker . To date , no official explanation has been provided to resolve the inconsistency . There has also been a discrepancy regarding the extent of Rex ' s mental resistance abilities . " The Clone Wars : The Visual Guide " suggested that Rex was not able to resist the mind trick that Asajj Ventress performed on him during the Battle of Teth , but the novelization of " The Clone Wars " film maintained that he was indeed able to avoid succumbing to her mind influence . This article assumes that the latter ' s interpretation is correct . The junior novelization of " The Clone Wars " film stated that Rex had the brown hair customary of clone troopers , which is inconsistent with the majority of other canonical material , in which his hair was depicted as bleached blond . In " " , Obi - Wan Kenobi addresses a clone trooper who is wearing Rex ' s customized blue - and - white armor as " Cody . " The " Decoded " re - airing of the first season episode " Jedi Crash " mistakenly referred to Commander Bly as Rex on one occasion . Also , the children ' s activity section of " " incorrectly identified the Advanced Recon Commando Havoc from the episode " ARC Troopers " as Rex . In addition to erroneously referring to Rex as a commander , Part 51 of " The Official Star Wars Fact File " mislabels an image of Clone Captain Keeli as Rex . In a young - reader adaptation of the second season episode " The Zillo Beast , " written for " " , Rex initially stays with Anakin Skywalker , Mace Windu , and Dr . Sionver Boll at the Doge ' s Palace on Malastare to oversee the Battle of Malastare , instead of leading the clone troopers on the battlefield as he does in the episode . Also , during the adaptation of " The Zillo Beast Strikes Back , " Rex orders the LAAT / i gunships to fire their Malastarian fuel bombs at the Zillo Beast during the battle at the Republic Executive Building , whereas a clone trooper pilot delivers the order during the episode . In both cases , this article follows the episodes ' interpretation of events . In the 2011 third season episode " The Citadel , " while preparing to undergo carbon - freezing to bypass the Citadel ' s defenses , Rex and Skywalker both state that they have not yet undergone the process . That contradicts the events of the 2008 comic " Shipyards of Doom " , in which they utilize the process to infiltrate Gwori ' s droid - manned blockade . Dave Filoni and then – Head Writer Henry Gilroy initially developed the carbon - freezing tactic during production on the television series ' first season , though Gilroy instead incorporated it into " Shipyards of Doom " . Until official clarification rectifies the inconsistency , this article — for the sake of preserving all canonical material — assumes that Rex and Skywalker ' s dialogue in " The Citadel " is in error . The 2011 Battle of Umbara story arc of the television series ' fourth season utilized " CT - 7567 " as Rex ' s clone designation instead of CC - 7567 , which various material had relied upon since his debut in 2008 . A November 11 , 2011 , update to Rex ' s Encyclopedia entry on StarWars . com verified that the change was intentional and canonized the new CT - 7567 designation . In " The Essential Reader ' s Companion " , an of a scene from " No Prisoners " depicted Rex in his trademark blue - marked armor despite the novel portraying him in standard - issue white armor . As a further complication , the image depicted Ahsoka Tano in her post – Season Three older outfit , despite the novel ' s early occurrence in the chronology of " The Clone Wars " . " Republic Heroes " Nintendo DS edition . The Nintendo DS version of " Republic Heroes " presented accounts of events involving Rex that sharply diverged from the equivalents in several episodes of the television series ' first season . In the game ' s interpretation of the mission to Skytop Station , General Grievous is absent , and the Republic squad is divided into two groups : Skywalker and Tano lead the first , while Rex and Denal comprise the second . The two units approach the station ' s reactor from different directions , and Skywalker eventually has the two clone troopers find a control panel to reactivate all systems in Sector AA - 23 . After destroying the station ' s reactor , Rex and Denal are ordered to rendezvous with the Jedi at the hangar so that they can escape aboard the " Twilight " . However , the destruction of the reactor triggers a fail - safe lockdown that seals the hangar ' s doors . R2 - D2 discovers that there are two terminals controlling the lockdown , both of which need to be deactivated to open the hangar doors . Arriving in the hangar bay , Rex and Denal defeat a number of battle droids there and prepare the " Twilight " for takeoff . Tano and R2 - D2 join them , and the astromech droid deactivates the first terminal . Skywalker disables the second terminal on the station ' s outer hull , thus shutting down the lockdown . As several IG - 86 sentinel droids pin down Rex , Tano , and Denal inside the " Twilight " , Skywalker defeats them and opens the hangar doors before escaping the station with the group . This portrayal of events opposes the version featured in the episode " Duel of the Droids , " in which the mission was first depicted . Rex is also featured in a different mission that conflicts with the episode " Lair of Grievous . " He and two other clone troopers assist Jedi Master Kit Fisto in infiltrating General Grievous ' s castle on the third moon of Vassek , while in the episode , it is Jedi Knight Nahdar Vebb ; Clone Commander CC - 3714 , nicknamed " Fil " ; and other clone troopers who accompany Fisto . Leaving the two clone troopers outside , Rex and Fisto navigate through the lair ' s mazes and fight numerous B1 and B2 battle droids , eventually confronting Grievous himself . After a brief duel with Fisto , Grievous retreats further into the castle , and Rex tells his soldiers outside to contact the Republic fleet at the planet Bestine and ask for reinforcements — an action that Fil does during the episode . However , the troopers fail to complete their orders , as a Vulture droid decimates their " Nu " - class attack shuttle , their only means of contacting Bestine . Rex and Fisto continue their pursuit of Grievous but are forced to split up . The Jedi Master eventually faces Grievous for a second time before retreating aboard his Delta - 7B starfighter . Rex later participates in a mission to the space station Juma 9 , which is a strategic Confederate outpost instead of a Republic mining facility like in the other editions of " Republic Heroes " . Using Separatist clearance codes that were previously stolen from Grievous ' s lair on the Vassek moon , Rex and another trooper accompany Luminara Unduli and Plo Koon to infiltrate the station . While Unduli and Koon set off to capture the station ' s bridge , Rex and his comrade prepare to breach the station ' s hull if needed . The droid forces eventually trap the two Jedi Masters between two force fields , and Rex is called in to assist them . He and the trooper move through the station and rescue the two Jedi . After doing so , Koon orders Rex and the other trooper to secure the nearby vicinity while the Jedi Masters seize Juma 9 ' s bridge . Besides the Juma 9 mission , Rex is involved in a bonus level in which he races through a battle zone to a checkpoint on Christophsis . Because of these storylines ' explicit contradictions of the original events in the television series , this article assumes that the Nintendo DS missions are non - canonical . " Slaves of the Republic " . The television series ' fourth season adapted the 2008 " Slaves of the Republic " comic book story arc into a three - episode arc : " Kidnapped , " " Slaves of the Republic , " and " Escape from Kadavo , " with Henry Gilroy — previous Head Writer and the author of the original comics — scripting the episodes alongside Steven Melching . Aside from the visual difference of incorporating the new character models for Anakin Skywalker , Ahsoka Tano , and Obi - Wan Kenobi from the third season and Rex ' s Phase II model from previous fourth season episodes , the trio of episodes transcribed plot elements from the six - part comic story . They are thus treated as the same story , with precedence being given to the television series in cases of inconsistencies . In " " , Rex , Skywalker , Tano , and Kenobi respond to the Confederate invasion of Kiros by launching a counterattack against the droid forces on the planet . The Separatist commander is Xerius Ugg , who was replaced with the Zygerrian Darts D ' Nar in " Kidnapped . " In the comic , when Skywalker and Tano go to defuse the thermal bombs throughout the capital city , Rex assists them once they come under fire from a sniper droideka at one of the bomb sites , using a sniper rifle to eliminate the droid . That scene is absent from " Kidnapped , " in which Skywalker and Tano face off against two sniper droidekas on their own . Furthermore , D ' Nar reveals the reason for the disappearance of the Togruta colonists , a role that the Zygerrian Captain Onyx fills in " " . " Chapter 2 : Slave Traders of Zygerria " begins with Rex accompanying Skywalker , Tano , Kenobi , and a squad of troopers aboard the " Twilight " to the black market haven known as the Shi ' kar Straits . Amidst the asteroids of the Shi ' kar Straits , Rex and the others encounter the Zygerrian slaver vessel " Fate ' s Hand " , captained by Onyx . Posing as slavers , Skywalker , Tano , and Kenobi board the " Fate ' s Hand " to acquire what information they can , while Rex and his troops hide behind several crates as backup . When the Jedi give up the ruse , Rex and the clone troopers forsake their cover and initiate a firefight with the Zygerrians . As Skywalker leads Rex , Tano , and some of their men to commandeer the " Fate ' s Hand " , more Zygerrians catch them in a crossfire . When a Zygerrian fires a rocket that damages the seal between the two vessels , Tano intentionally seals herself aboard the " Fate ' s Hand " , while Rex , Skywalker , and Kenobi are stuck on the " Twilight " with several trapped Zygerrians , who surrender . A dismayed Rex reports Tano ' s actions to Skywalker and Kenobi , who deduce that she intends to infiltrate the " Fate ' s Hand " by acting as a hostage . Rex secures the docking clamp s of the " Twilight " to ensure that they will not be separated from the " Fate ' s Hand " . Attempting to break free of the " Twilight " , Onyx pilots his ship through the asteroid belt , and the " Twilight " bottom stabilizer is compromised from a collision with an asteroid . After Skywalker fires at and disables the engines of the " Fate ' s Hand " , Tano contacts the " Twilight " . At Kenobi ' s direction , she is able to unlock the Zygerrian ship ' s rear airlock , but Onyx discovers her exploit . Rex and another trooper follow Skywalker and Kenobi on a space - walk to board the " Fate ' s Hand " and rescue Tano , but a blixus creature that Onyx has released intercepts them . The blaster - impervious creature kills the other clone trooper and captures the two Jedi in its tentacles before Skywalker in turn kills the beast , halting its rampage . Boarding the " Fate ' s Hand " , Rex and the Jedi confront Onyx , who is forced to convey his intelligence regarding the missing Togruta . Onyx reveals what Darts D ' Nar does in " Kidnapped " — that the Royal Slave Auction is being revived on Zygerria , and the people of Kiros are to be sold into slavery . At Kenobi ' s behest , Rex takes Onyx to imprison him on the " Twilight " with the rest of his crew . As a whole , the storyline of " Slave Traders of Zygerria " underwent substantial revision before being included in " Kidnapped . " The next episode , " Slaves of the Republic , " adapts plot elements from the comic ' s third and fourth issues , " " and " " . In the episode , Rex , Skywalker , Tano , and Kenobi take a Zygerrian vessel to Zygerria to investigate the Royal Slave Auction , though it is D ' Nar ' s " Tecora " instead of Onyx ' s " Fate ' s Hand " . Although " The Depths of Zygerria " depicts Skywalker initially considering having Rex masquerade as the undercover team ' s slave for sale , only for Tano to convince him otherwise , that detail is not present in " Slaves of the Republic , " in which Tano is disguised as the group ' s slave from the beginning , while Rex has the alternate task of helping Kenobi find the missing Togruta . In " The Depths of Zygerria " , after Skywalker sends her back to the ship , Tano joins Rex and Kenobi in trailing Skywalker and his Zygerrian guard escorts to the Zygerrian Royal Palace . She is thus present when Rex and Kenobi find Governor Roshti in the palace ' s catacomb cells . After liberating Roshti , Rex and his comrades escape from Zygerrian guards aboard a pair of reptile - like creatures . Skywalker contacts Tano and orders her to come to the palace , as he requires slave merchandise to prove to Queen Miraj Scintel his cover story as a slave hunter . While the Zygerrians capture Kenobi and Roshti , Rex and Tano proceed to the palace as slave handler and slave , respectively , helping Skywalker win both Scintel ' s trust and a seat at the Royal Slave Auction . The events of the episode proceed differently : Tano remains with Skywalker from the beginning of the mission to distract Scintel , allowing Rex and Kenobi to scour the palace area for the Togruta colonists . Rex and Kenobi discover Roshti in the Royal Palace ' s outdoor slave cells instead of in the catacomb cells , and all three of them attempt to escape on a brezak mount , with only Rex succeeding in reaching safety . He does not return to the Royal Palace to pose as Tano ' s handler as he does in the comic ; the episode instead moves forward and depicts the Royal Slave Auction . In the comic , when Skywalker launches their attack on the Zygerrians at the auction house , Rex ambushes the royal guards by swinging from a cable , only to be knocked unconscious by a rocket from one of the guards . In the episode , he fights alongside the Jedi in a similar fashion , though he is instead felled by a Zygerrian guard ' s shock whip . For the entirety of the episode , Rex wears a Zygerrian slave trader suit , whereas in the comics he disguises himself as a member of Skywalker ' s security detail and , later , as a Zygerrian guard with bulky armor for the Royal Slave Auction . He consequently retains his slave trader uniform when he arrives on Kadavo in the episode , instead of the plain robe that he dons in " Auction of a Million Souls " . Whereas the keeper of the Kadavo facility went unnamed in the comics , material for the television series ' adaptation identified the character as Agruss . In " " , the Togruta are punished for Kenobi ' s defiance as they are in " Escape from Kadavo . " Absent from the episode but present in " Chapter 6 : Escape from Kadavo " is the Togrutas ' belief that the Confederacy has obliterated their homeworld , which intensifies their despair . While working at an atmosphere - filtration turbine station alongside the Togruta , Rex and Kenobi rally the colonists with the news that Kiros has been liberated , giving them a reason to endure and survive the ordeal . The Togrutas ' response to that news , perceived as hope , is what leads the keeper to call Rex and Kenobi to the command center for execution , instead of Count Dooku ordering him to do so , as is the case in the episode . The manner in which Skywalker and Tano rescue Rex , Kenobi , and the Togruta slaves on Kadavo differs greatly between the comic and the episode . In the comic , Skywalker and Tano arrive on Kadavo with a Republic strike force led by Commander Cody . The Separatists respond by deploying a fleet under the joint command of General Grievous and Asajj Ventress , the latter of whom leads a Vulture droid assault on the facility , as Dooku aims to hide his involvement in the slavery affair by eliminating the Togruta . Rex and Kenobi take advantage of the distracted Zygerrians by attacking them and joining Skywalker and Tano in rescuing the Togruta from falling into the lava pit below the compound . While Grievous recalls his assault fleet , the Jedi use the Force to pull the Togruta onto a freighter . When Ventress assaults the Jedi ' s freighter with her personal starship , the " Trident " , Rex fires a rocket at the craft , and the arrival of Plo Koon and a squadron of V - 19 Torrent starfighters forces Ventress to retreat . Also , the keeper is not killed , simply taken into Republic custody . In the episode , no enemy forces save for the Zygerrians defend the facility against the Republic ' s rescue attempt . In place of Cody , Commander Wolffe and Admiral Coburn help Koon coordinate the rescue effort . Furthermore , instead of being involved with the rescue of the Togruta , Rex and Kenobi kill Keeper Agruss and defeat his guards before departing from the compound , while Tano , Wolffe , and Coburn save the colonists . The aftermath of the rescue on Kadavo was also modified from the comic ' s version for the episode . In the comic , Rex and the others spend four more rotations evacuating the Togruta , after which they prepare to destroy the processing hub . As Rex is about to detonate charges placed in the facility , Supreme Chancellor Palpatine contacts them and orders that the facility be preserved for future Republic use . The Jedi disagree with the order , and Rex proceeds with eradicating the complex . Upon being returned to Kiros , the Togruta forsake their pacifistic ways to learn how to defend themselves , and Rex is among the clone troopers who educate them in blaster combat . In the episode ' s portrayal of the events , Koon ' s aerial forces demolish the Kadavo complex during the battle . Rex and the others debrief aboard Koon ' s Star Destroyer , but the episode does not include the Togrutas ' return to Kiros . Non - canon history . The following details stories that were not deemed canon within " Star Wars " Legends due to their disregard for established continuity . " Star Wars Miniatures " advertisement . In an for the " Star Wars Miniatures : The Clone Wars " set , Rex and Ahsoka Tano defeat the bounty hunter Durge with a squad of clone troopers and a Wookiee . When General Grievous appears , Rex and his comrades quickly incapacitate the cyborg , severing several of his limbs with blasterfire . Walking away from their victory , Rex questions how many orders they have been given , since they are nearing directive number sixty - six . LEGO " Star Wars " online material . In the LEGO " Star Wars : The Clone Wars " online comic series , Rex and a squad of clone troopers are assigned to undertake a mission , but battle droids shoot down their LAAT / i gunship on a desert planet . Just as Rex reports that the mission is proceeding as planned , several B1 battle droids and an OG - 9 homing spider droid ambush them . After the spider droid knocks over Rex , he and his troops open fire on the droids . While the other troopers attack the droid menace , Rex finds a clone trooper from Batch 82 - 4 who is avoiding the battle due to his arachnophobia , a trait specific to his batch . The spider droid charges at Rex and the trooper , and the two take refuge in the remains of the gunship . Rex explains to the scared trooper that it is a droid , not an actual spider , and he watches as the soldier takes up arms and defeats the spider droid single - handed . As Rex congratulates his men on their victory , three more spider droids appear . Rex joins Skywalker , Tano , Kenobi , and Rotta the Huttlet in a search for Asajj Ventress . Their team ' s AT - TE walker finds a squad of IG - 100 MagnaGuards and their " Rogue " - class starfighter on a planet , but a B2 super battle droid and several IG - 227 " Hailfire " - class droid tanks arrive and blast the walker off its feet . Emerging from their damaged vehicle , Rex , Tano , and Kenobi fight the new arrivals while Skywalker battles the MagnaGuards at the landing platform . Ventress appears with the Death Brick weapon and throws it at the three Jedi before escaping with the battle droids . Rex jumps into the line of fire and blocks the brick , which simply bounces off his head harmlessly . Commander Cody lands in the vicinity with an LAAT / i gunship and transports Rex , Skywalker , Tano , and Kenobi away from the planet . Rex is later sent with Kenobi , Cody , and a detachment of clone troopers to rescue Skywalker and Tano in a space battle , but a Separatist tractor beam pulls the group to the surface of a nearby planet . R2 - D2 is able to open the door of Rex ' s gunship — which has been jammed from the crash — in time , and Rex arrives with Plo Koon to save Skywalker , Tano , Kenobi , Cody , and their squad of troops from Ventress and an army of battle droids . The Separatists are repelled , and Rex reports R2 - D2 ' s actions to Kenobi . Rex is present when Koon is given an award for his valiant efforts in the battle . Later , aboard Supreme Chancellor Palpatine ' s " Venator " - class Star Destroyer , Rex and Cody are present when Palpatine fires a clone scout squad in person for their incompetence and failure to find a missing R2 - D2 . Rex also accompanies Skywalker to Orto Plutonia when the Separatists stage an attack there . Traveling to the surface with Skywalker and several other clone soldiers in containers carrying Freeco bikes , Rex and his comrades defeat the droid infantry on the planet . In , Palpatine personally dispatches Rex and Cody to find R2 - D2 , who has gone missing in action . On an ice planet , the two clone officers lead a patrol and encounter a squad of B1 and B2 battle droids along with an OG - 9 spider droid and an All Terrain Armored Transport . Skidding across the ice , Cody drops a projectile , and Rex swings at the piece with his blaster . The projectile cuts through the droids and hits the AT - AT walker , collapsing it onto the spider droid and overturning a nearby NR - N99 " Persuader " - class droid enforcer . With their enemies neutralized , the two clones build a " Nu " - class attack shuttle from the rubble . Rex and Cody then join Skywalker and Tano in raiding a Separatist " Lucrehulk " - class Droid Control Ship , where they rescue R2 - D2 from Grievous , Ventress , and Count Dooku . As Rex and the others prepare to face off against the Separatists , Yoda and Kenobi arrive . Yoda uses the Force to collapse the floor beneath Dooku , Grievous , and Ventress , sending them into space , and also forms a CR90 corvette . Rex and his comrades uses the craft to escape from the Droid Control Ship shortly before it explodes . Following the victory , Rex and Cody accompany the Jedi to the " Skywalker World " theme park . Rex is also featured in the film ' s , in which he serves as one of the clone trooper enemies for the game ' s two playable Separatist characters , Dooku and Ventress . In the " Light Side " campaign of , Rex is one of the clone troopers who is made available as an in - game asset to defeat enemies . The only level in which he is offered is the final Coruscant level , in which the player , as Mace Windu , must open the Jedi Archives ' Holocron Vault and defeat Grievous within . The player can purchase up to four copies of Rex at one of the level ' s build points ; he is the most expensive clone trooper , with the cheaper ones being a standard trooper and a 501st trooper . However , using him is not required . Cartoon Network online games . Rex was featured in several online games on CartoonNetwork . com , all of which are no longer available . In " Path of the Jedi " , the player could choose to play as either Anakin Skywalker , Ahsoka Tano , or Yoda . In the " Assassin ' s Snare " campaign , which adapted the first season episode " Cloak of Darkness , " Rex and his men are fighting a detachment of Separatist battle droids aboard a Republic cruiser when the clone troopers are cut off from their heavy weapons storage . If the player is playing as Tano , Skywalker sends her to retrieve the soldiers ' electromagnetic pulse grenades from behind enemy lines . If the player chooses Yoda , then a clone trooper sends Yoda on the mission ; if Skywalker is chosen , then Kenobi dispatches him on the assignment . After being rearmed with their supply of droid poppers , Rex and his troops make short work of the opposing battle droids . In the " Shadow of Grievous " campaign , which adapted the events of the episode " Duel of the Droids , " Rex and a squad of his troops are defending a Republic medical station from the Separatists but are gradually outnumbered by the enemy forces . Depending on the player ' s selected character , Skywalker , Tano , or Yoda cuts through the battle droids and rescues Rex and his men . In Cartoon Network ' s " " , Rex was one of five characters whom players could use while designing their own online games . The game system allowed players to both create their own games and play those developed by others . Rex ' s " Power Attack " in the game was launching landmines . In the " Galaxy of Heroes " game , Rex was one of the playable characters in various shooting - style missions . Armed with only his blaster pistols , Rex must first defeat all opposing forces at a battle droid compound . He is then given an AT - TE walker to pilot and is tasked with destroying an enemy base , cutting through missile turrets , droid - manned STAPs , and laser emplacements to achieve his objective . Clone Wars Infinities . In the " " Infinities version of the second season episode " Brain Invaders , " brain worms infect both trooper CT - 9544 , nicknamed " Scythe , " and Commander Cody in the wake of the Second Battle of Geonosis . While Ahsoka Tano and Kit Fisto contain Scythe and other infected troopers , Cody spreads the parasite among the Republic fleet . Rex , Anakin Skywalker , and Obi - Wan Kenobi all fall victim to the worms , which reach the Jedi Order and the Republic government on Coruscant . Only Tano , Fisto , and Barriss Offee have the knowledge to contain the worms , but with the whole of the Republic at the worms ' mercy , time begins to run out for the uninfected Jedi . In the Infinities version of the third season episode " The Citadel , " as presented in the " " , Rex , Skywalker , Tano , Kenobi , and their men are frozen in carbonite as planned to rescue Even Piell from the Citadel . When R2 - D2 transports the elite team to the prison , a rogue hyperspace shadow collides with their shuttle , sending them off - course and shorting out R2 - D2 ' s circuits . While Rex and his comrades drift in space , locked in perfect hibernation , the Republic is replaced with the first Galactic Empire under the leadership of Emperor - for - life Palpatine . Almost twenty years after their unintentional detour , Rex and the team are found by Bail Organa and other members of the fledgling Alliance to Restore the Republic and are taken to the planet Dantooine to be unfrozen . Although shocked to learn of the intervening events over the last two decades , the Jedi join the Rebel Alliance in resisting the Imperial regime . " LEGO Star Wars III : The Clone Wars " . Rex is featured in numerous levels of the multi - platform game " LEGO Star Wars III : The Clone Wars " . In addition to his trademark blaster pistols , the game ' s mechanics give him the use of a grapple gun and shock grenades , as well as the ability to command clone troopers during assault levels . The game ' s story - based levels , which humorously adapt a number of first and second season episodes , are organized into three main campaigns , each of which focuses on Count Dooku , General Grievous , or Asajj Ventress . Rex is a playable character in the level for the first season episode " Blue Shadow Virus , " which is part of Ventress ' s campaign . In the Grievous storyline , Rex is incorporated into the levels adapting " Duel of the Droids " and " Rookies , " while he is also featured in the " Weapons Factory " level within the Dooku campaign . He is unlocked for " Free Play " mode following the completion of the first level in which he appears within each campaign ' s " Story " mode . In addition , he is one of the playable characters for the epilogue level of " Story " mode , " The Zillo Beast . " In the game ' s " Republic Assault " mode , four levels feature Rex as one of the two Republic commanders whom the player can control : Saleucami and the Rishi moon , alongside another clone trooper ; and the Ruusan moon and the third moon of Vassek , along with Commander Cody . In " Separatist Assault , " Rex acts as one of the enemy commanders in five levels : the third moon of Vassek , the Rishi moon , the Ruusan moon , Rugosa , and Christophsis . " Star Wars : The Clone Wars : Head - to - Head " . As part of the non - canon matchups presented in " " , Rex is pitted against a deadly Separatist Infiltrator / Demolition droid , which disguises itself as a common sweeper droid to attack Coruscant ' s power generator complex . Bringing along a clone trooper security team , Rex is the first on the scene at the power generator and intercepts the demolition droid , which quickly expands into combat mode . He leaps behind some cover to evade the droid ' s arm - mounted laser cannons , returning fire with his twin blaster pistols . Ultimately , his precision in marksmanship saves the day : He prevents the demolition droid from arming itself as a bomb , dislodging its explosive charge from its housing . He then manages to disable the droid beyond repair with more blasterfire . The storyline closely mirrors the events of the third season episode " Heroes on Both Sides , " in which a team of Separatist demolition droids execute a bombing of Corsucant ' s power generator . Whereas the droids are successful in the episode , the demolition droid fails its mission in " Head - to - Head " due to Rex ' s intervention .