Rescue on the Tranquility / Legends The Confederacy of Independent Systems launched a mission in 22 BBY during the Clone Wars to free Trade Federation Viceroy Nute Gunray , who had been captured on Rodia by the Galactic Republic . Gunray was being taken in the Star Destroyer " Tranquility " to Coruscant for trial by Senior Jedi General Luminara Unduli , Jedi Commander Ahsoka Tano , Clone Commander CC - 1004 , nicknamed " Gree , " and Senate Commando Captain Faro Argyus . However , the latter was a long - time ally of Count Dooku , and had been paid to participate in freeing the viceroy . As the Jedi began interrogating Gunray aboard the " Tranquility " , Dark Acolyte Asajj Ventress took a boarding party of Vulture droids and several boarding craft to the Republic warship . Once battle droids had boarded the Star Destroyer and attacked Unduli and clone troopers of Green Company , Ventress planted explosives in the vessel ' s engine room before confronting Tano outside of Gunray ' s cell . After Unduli arrived with Commander Gree on the detention level , Ventress activated her explosives , crippling the entire ship . Ventress escaped , and while Unduli instructed Tano to stay and guard Gunray , the Jedi Master pursued the Dark Acolyte to the engine room . Tano disobeyed Unduli ' s orders and proceeded to assist Unduli in her duel against Ventress , however . Meanwhile , Argyus betrayed the Republic and freed Gunray . The captain engaged Gree in close combat , but Gunray managed to sneak up behind the clone commander and knocked him out with a blaster . Argyus and Gunray then stole a Republic frigate and escaped from the " Tranquility " , while Ventress joined them , jettisoning from the Star Destroyer in an escape pod to the fleeing vessel . Prelude . In 22 BBY , during the Clone Wars , Trade Federation Viceroy Nute Gunray was captured on Rodia by Senators Padmé Amidala and Onaconda Farr of the Galactic Republic . Gunray was to be taken to Coruscant to stand trial for his war crimes , as a trial on the galactic capital would rally support for the war , and Senior Jedi General Luminara Unduli was assigned to oversee his transfer to Coruscant . In the midst of an ongoing battle , Jedi General Anakin Skywalker learned that his secret wife , Amidala , had been involved in Gunray ' s capture and sent his Padawan , Jedi Commander Ahsoka Tano , to protect her from potential danger from the Confederacy of Independent Systems . Receiving clearance from Masters Yoda and Mace Windu of the Jedi High Council , Tano joined Unduli and Clone Commander CC - 1004 , nicknamed " Gree , " in escorting the viceroy to Unduli ' s waiting flagship , the " Venator " - class Star Destroyer " Tranquility " , via a " Consular " - class cruiser . Upon the group ' s arrival on the Star Destroyer , Senate Commando Captain Faro Argyus — who had been personally assigned to the mission by Supreme Chancellor Palpatine — and his fellow Senate Guards placed Gunray in a cell , ready for interrogation . Meanwhile , Dark Lord of the Sith Darth Sidious learned of Gunray ' s capture and contacted his Sith apprentice , Darth Tyranus , who was with a Separatist fleet of " Munificent " - class star frigates under his command . Count Dooku — as Tyranus was also known — stated that he already had a plan in operation to rescue Gunray involving Dark Acolyte Asajj Ventress , and while Sidious was doubtful of her abilities , he allowed Dooku to proceed . Ventress planned to infiltrate the " Tranquility " , and as a squad of B2 super battle droids attacked the clone troopers aboard the Star Destroyer , she would plant explosives to cripple the cruiser . Once the " Tranquility " had been damaged , Ventress planned to lure the Jedi away from Gunray and signal Argyus — who was a long - time ally of Dooku and had been given a hefty payment to assist the Confederacy in the mission — to free Gunray . Ventress departed Count Dooku ' s fleet with a squadron of Vulture droids and several " Droch " - class boarding ships to attack and board the " Tranquility " . The operation . Infiltrating the " Tranquility " . As the Jedi began to interrogate Gunray inside his cell block , the Confederate boarding party arrived . With Vulture droids attacking the " Tranquility " , the captain of the cruiser , on the bridge of the Star Destroyer , reported the appearance of the boarding craft to Gree , Argyus , and the Jedi . Gree alerted Green Company and sent the troopers to repel the enemy . The three Confederate boarding ships breached the hull of the " Tranquility " and lodged themselves in the Star Destroyer near its hangar bays . The troopers of Green Company arrived and took cover behind several crates from the battle droids that were being deployed from the boarding craft . In the ensuing crossfire , the droids attacked the over - matched clones with lasers and , in the case of a B2 - HA series super battle droid , rockets . The advance clone forces were subsequently defeated , including Green Leader . Ventress emerged from one of the boarding ships and quickly decapitated the last surviving clone trooper with her paired lightsabers . Stealing the trooper ' s comlink , Ventress cut a hole in one of the vents in the ceiling of the hangar with her lightsabers and proceeded to the " Tranquility " engine room . The Dark Acolyte was able to slip past 327 - T , the WED - 15 Treadwell droid that was inspecting the area , and plant several thermal detonators around the Star Destroyer ' s main reactors before escaping and heading to the detention level to personally confront the viceroy ' s captors . Meanwhile , Tano remained with Argyus to guard Gunray while Unduli and Gree went to assist the clone troopers in fighting the droids . Elsewhere , super battle droids marched through one of the Star Destroyer ' s hallways , engaging six remaining Green Company troopers . The troopers ' numbers were cut in half , but they were saved by the arrival of Unduli and Gree . The Jedi and the troopers attacked the battle droids and eventually defeated their opponents , leaving the hallway ridden with fallen battle droids . Nevertheless , Unduli sensed that their troubles were not over . Indeed , Ventress was preparing to face off with Tano and Argyus on the detention level at that very moment . As Argyus received word that the enemy had been repelled and reported the update to Tano , Ventress cut a hole in the detention level ' s ceiling and knocked the two Senate Commandos manning the control station of the " Tranquility " there unconscious . The Dark Jedi then confronted the Padawan , and the two exchanged insults before engaging in a lightsaber duel . While the pair fought , Unduli overheard the lightsaber clashes and quickly headed back for the detention block with Gree and the remaining clones . Tano ordered Argyus and the other Senate Commandos to open fire on Ventress , but the Dark Acolyte deflected and rebounded the lasers , killing all of the Commandos save for Argyus . The Senate Commando captain himself blocked the reflected shots with his shoulder armor , but in order to keep the Separatist agent ' s cover from being compromised , Ventress attacked him as well and Force - pushed him toward the control station , knocking him unconscious . Breaking away from dueling Tano , Ventress proceeded to deactivate the laser gate of Gunray ' s cell . As the Padawan arrived and slashed at the viceroy , Ventress kicked her into the detention cell . Gunray quickly stepped out and reactivated the lasers , trapping Tano . Nevertheless , Unduli arrived at the detention blocks with the clone troopers , changing the course of the fight with her reinforcements . Running to engage Ventress , the Jedi Master also telekinetically deactivated the laser bars of Tano ' s cell . Ventress dueled both Jedi at once , and Unduli ordered the Dark Acolyte to surrender . Duel in the engine room . With no intention of giving up , Ventress activated the explosives planted in the engine room . The " Tranquility " shook under the resulting blast , and as everyone in the room lost their balance , Ventress took the opportunity to Force - push Unduli to the ground . The Jedi Master rolled aside , avoiding several lightsaber slashes aimed at her head . Although the clone troopers opened fire at the Dark Acolyte , Ventress jumped over them and opened a turbolift shaft door with the Force . The Dark Acolyte escaped , plunging her lightsabers into the side of the turbolift shaft to control her descent . Checking the Star Destroyer ' s sensors and controls , Argyus reported that all systems — including communications — had been disabled from the explosives . Ventress had crippled the entire ship . While Gunray was taken back to his cell , Unduli decided to face Ventress alone . Although Tano , having previously faced Ventress , stated that the Dark Acolyte was too powerful for a single opponent and offered to help , Unduli refused the Padawan ' s assistance and left to face Ventress alone . Following a trail of fallen clone troopers that the Dark Acolyte had left in her wake , Unduli arrived in the engine room . After the Jedi Master had entered the room , Ventress appeared and slashed at her , diffusing a pipe and injuring Unduli ' s left eye . The Jedi Master back flipped onto another reactor with Ventress in pursuit . While the two exchanged blows , Unduli commented on the sloppiness of Ventress ' s fighting style , seeking to distract her adversary . Enraged , Ventress jumped toward Unduli , and the two continued their fight with renewed force . Back on the detention level , Tano decided to disobey Unduli ' s order to guard Gunray and proceeded to assist her in her duel , believing that Ventress was too powerful for any one Jedi . As the lightsaber battle continued though the reactor room , Ventress and Unduli employed Force - pushes against each other . After a few moments , both Jedi Master and Dark Acolyte released the energy and were pushed backward . Unduli jumped over Ventress , aiming several lightsaber blows before landing behind her . The pair turned back around to face each other , and Ventress lunged at the Jedi Master , but instead of slashing at her , she kicked her off the reactor to the floor far below . As Unduli fell and lost hold of her lightsaber , Ventress jumped up and detached several fuel pipes from the ceiling . Unduli tried to use the Force to avoid being crushed by the resulting falling debris , but her leg had been caught under one of the pipes . Taking advantage of Unduli ' s vulnerability , Ventress leaped to kill the Jedi Master , lightsabers spinning . However , Tano arrived in time to Force - push Ventress into an open pipe . The Padawan freed Unduli and retrieved her lightsaber for her , and Unduli accepted Tano ' s help . Ventress climbed out of the pipe and , making use of Dooku ' s training to duel more than one Jedi at once , engaged the two Jedi in simultaneous lightsaber combat . Ventress eventually ascended the large reactors and disappeared from sight to keep Unduli and Tano occupied . Believing Ventress to be after Gunray , the Jedi jumped up and searched for Ventress , but the Separatist agent instead used her stolen comlink to secretly signal Argyus to free the viceroy . Betrayal and escape . On the detention level , Argyus received Ventress ' s signal and killed both of his Senate Commando companions . Engaging Gree in blaster combat , the traitorous Senate Commando forced the clone to take cover from the incoming fire . While the two exchanged laser shots , the captain freed Gunray from his cell and used the viceroy as a " living shield , " forcing Gree to cease fire to avoid killing the prisoner . Back in the engine room , Unduli and Tano came across 327 - T , who had been trapped under some debris , and freed the droid before continuing their search for Ventress . Receiving word of Argyus ' s betrayal form Gree , the two Jedi headed back to the detention level to assist the clone . Intending to keep them occupied , Ventress hurled a pipe at them with the Force . Turning around , Unduli severed the projectile , and she and Tano continued their duel , engaging Ventress in a saberlock . Gree shot Argyus ' s blaster out of his hand , but as the clone commander ordered Argyus to surrender , the captain shoved Gunray at the trooper . Gree pushed the viceroy aside , and Argyus used the clone ' s momentary distraction to kick his blaster out of his hand and his helmet off . As Gree confronted Argyus concerning his loyalty to the Republic , the captain bent down to grab the clone ' s fallen blaster . The commander punched the Senate Commando in the head , knocking him to the ground . As the clone commander took aim at the captain , however , Gunray sneaked up behind the clone and knocked him out with the butt of Argyus ' s blaster , mocking the unconscious clone ' s single - minded loyalty to the Republic . Back in the engine room , Tano and Unduli took turns advancing at Ventress , forcing the Dark Acolyte to give ground . The two Jedi cut through the debris that the Separatist agent Force - pushed at them , and the Jedi Master rebounded the last piece back at Ventress . The Dark Acolyte Force jumped , avoiding the projectile , and charged at the pair again . As the duel continued , Argyus signaled Ventress with his comlink that Gunray had been freed . The Dark Acolyte broke off from her fight with the Jedi and jumped up , propelling herself off a reactor into an overlooking air vent . When Tano followed , Ventress threw a thermal detonator back at the reactor and escaped as the explosive detonated . Tano fell off the walkway of the engine room , but Unduli caught her and managed to pull her back up . Argyus and Gunray escaped in the " Consular " - class cruiser docked in the lower hangar , while Ventress disposed of two clone troopers guarding the Star Destroyer ' s escape pods . Stealing a pod for herself , Ventress departed the " Tranquility " , and Tano and Unduli arrived too late to prevent her from escaping . With the Star Destroyer still crippled , the Jedi could only watch from one of the " Tranquility " viewport windows as the Separatist agents fled with the newly liberated Viceroy Gunray . Aftermath . In space , Ventress docked her escape pod to the " Consular " - class cruiser and climbed aboard . Yet , when Argyus claimed credit for the mission , Ventress executed him with her lightsaber . Back aboard the " Tranquility " , Tano and Unduli informed Skywalker and Jedi Grand Master Yoda of Gunray ' s escape via holotransmission . Argyus and the viceroy had used a Republic vessel to escape , but Unduli had been able to track the ship through its tracking beacon . Unduli had alerted Master Kit Fisto and his fleet , which had been near Gunray ' s position , to follow the viceroy ' s signal and recapture him . After Unduli reported the developments to Yoda and Skywalker , Tano left Unduli and departed the " Tranquility " to rendezvous with her master . Meanwhile , Dooku had come to doubt the abilities of his best general , Grievous . In order to reassess the general ' s powers , the Confederate Head of State planted the Republic tracking beacon in Grievous ' s own lair on the third moon of Vassek in order to lure Fisto and his former Padawan , Nahdar Vebb , to the planet . Once the Jedi were in place , Grievous was able to hunt them for sport , allowing Dooku to review Grievous ' s abilities . Behind the scenes . The battle first appeared in " Cloak of Darkness , " an episode in the 2008 . It featured the series introduction of Captain Argyus , who had previously appeared throughout the series ' , and also featured Luminara Unduli , who first appeared in the series as a hologram in the episode " Destroy " Malevolence " . " Additionally , the battle also appeared in the young readers book " " , while the duel during the battle appeared in the 2008 video game " " .