Second Imperial Civil War The Second Imperial Civil War , also known as simply the Imperial Civil War and to the Galactic Alliance Core Fleet as the Second Rebellion , was a conflict that began with the end of the Sith – Imperial War in 130 ABY . It was the result of the Imperial victory at Caamas , in which part of the Galactic Alliance Defense Fleet refused to surrender ; the Massacre at Ossus took place , in which several Jedi managed to survive ; and , finally , the coup executed by Darth Krayt and the One Sith . This resulted in the fragmentation of the Fel Empire into two factions , one loyal to Fel and another loyal to the Dark Lord of the Sith . Over the next seven years , Krayt ' s empire was challenged by both Fel ' s Imperial supporters and the remnants of the Galactic Alliance under Admiral Gar Stazi . By 137 ABY the insurgency was still ongoing and was accelerated by Fel ' s capture of the Outer Rim Imperial fortress world of Bastion , providing Fel ' s forces with a staging center to coordinate the war against Krayt ' s Empire . Following the Battle of Dac and Krayt ' s genocidal campaign against the Mon Calamari species , Fel ' s Imperial faction aligned itself with the Stazi ' s Galactic Alliance Remnant despite earlier Sith attempts to sabotage negotiation efforts . Both forces cooperated in several key campaigns including a raid on Ralltiir and the Evacuation of Dac . A unexpected albeit secret development in the war occurred when Darth Krayt was killed by his most trusted adviser Darth Wyyrlok III after a duel with the Jedi on Had Abbadon . Alleging that Krayt was ill and had entered into seclusion , Wyyrlok III took de - facto control of the Empire while claim to rule on his master ' s behalf . However , Krayt was resurrected through the dark side of the Force and revealed himself to members of the One Sith before unleashing his secret weapons on all his opponents including Fel ' s Imperial loyalists , the Alliance Remnant and the traitorous Wyyrlok . A fourth faction within the conflict was composed by the surviving members of the New Jedi Order , such as Wolf Sazen , Shado Vao and K ' Kruhk , with the support of Master Shaper Nei Rin , who also sought to work with Fel and Stazi in order to bring down the Sith and reestablish their place in the galaxy . History . Origins . The Second Imperial Civil War was the result of a successful coup in 130 ABY by Darth Krayt ' s One Sith which overthrew Roan Fel — ruler of the Galactic Empire and a leader of the light side Imperial Knight s . Prior to the coup , most of the Galactic Alliance had capitulated with the exception of Admiral Gar Stazi ' s Core Forces following the Battle of Caamas . Following the victory , the Sith attempted to destroy the Jedi Order by attacking the Jedi Academy on Ossus , against the express orders of Emperor Roan Fel . The Sith coup was secretly backed by a number of prominent members of the Imperial Moff Council including Grand Admiral Morlish Veed and Moff Nyna Calixte . However , Moff Calixte realized that with Fel gone , the Sith would no longer need the Moff ' s Council to control the Empire . Thus , she warned Fel of the impending coup , allowing him to replace himself with a double while escaping offworld . The coup established Darth Krayt as Galactic Emperor over much of Fel ' s Empire despite resistance from Fel loyalists and the Alliance Remnant . Fel ' s Imperialists loyalists included the Imperial Knight s , the 501st Legion , the 908th Stormtrooper Division and the Bastion Second Fleet . On the other side were the Imperials who believed in loyalty to the institution above the individual and therefore had sided with Krayt ' s One Sith , including the 407th Stormtrooper Division , the Outer Rim Third Fleet , the Coruscant Third Fleet and the Moff Council , though the Council sought to undermine the Sith ' s efforts in order to achieve its own ambitions . Krayt controlled much of the galaxy including key centers like Coruscant , Ralltiir and Dac . Meanwhile , Stazi ' s Core Forces had evolved into the larger Galactic Alliance Remnant which fought Darth Krayt ' s Galactic Empire . Over the next seven years , Krayt ' s empire was challenged by both factions . The Alliance Remnant was composed of surviving remnants of the Core Fleet and other Alliance units . In addition to numerous battle cruisers and escort vessels , Stazi ' s fleet also included one of the elite starfighter units — Rogue Squadron led by Weequay Commander Jhoram Bey . The Mon Calamari , longtime supporters of the GA and its Rebel Alliance and New Republic predecessors , supplied Stazi with spare parts , supplies , bacta , and new recruits . This helped to keep Stazi ' s fleet combat - ready , though supplies were increasingly hard to come by , due to similar actions undertaken by Roan Fel ' s Loyalist forces . A fourth faction within the conflict was composed by the surviving members of the New Jedi Order , such as Wolf Sazen , Shado Vao and K ' Kruhk , with the support of the Yuuzhan Vong Master Shaper Nei Rin , who also sought to work with Fel in order to bring down the Sith and reestablish their place in the Galaxy . Recapturing Bastion . After seven years of guerrilla warfare against Krayt ’ s Empire , Fel moved to retake Bastion , the former capital of the Imperial Remnant and an impregnable fortress world . Escorted by his Imperial Knight s , the Emperor landed on Bastion where he was immediately greeted by an honor guard of the Imperial stormtroopers of the 501st Legion . Fel gave an impassioned speech to these troops , calling upon them to join him in the fight against the usurper Dark Lord of the Sith . The 501st immediately knelt before their rightful Emperor , thus leaving the service of Krayt ' s Empire . An attempt by the pro - Sith Lieutenant Kiefer to arrest and subsequently assassinate Fel was thwarted by General Oron Jaeger , commanding officer of the 501st Legion . Jaeger told Fel that his forces were under Fel ' s command , and the takeover was complete . Thus Fel regained control of Bastion with virtually no casualties and gaining the support of the Imperial garrison . With Bastion under Imperial control , Fel moved to gather his forces against Krayt , hoping to keep his quiet takeover of Bastion a secret to the galaxy , especially to Krayt . Despite this success , meanwhile Fel ’ s 908th Stormtrooper Division on Borosk was wiped out by the loyalist 407th Stormtrooper Division under the command of Darth Maleval . Hoping to draw Fel into the open , Krayt ordered his personal assassin , Darth Talon , to capture or drive Fel ' s daughter , Marasiah Fel , to her father . Though his daughter was on the run , Fel ordered his Imperial Knights , especially Antares Draco and Ganner Krieg , to keep away from Marasiah . Fel knew that Krayt couldn ' t find out about Bastion ' s capture in order for Fel to secretly gather his forces , and if Draco and Krieg rescued Marasiah , Imperial forces would track Draco and Krieg back to Bastion , exposing Fel . Despite this , Draco and Krieg disobeyed Fel , and went to rescue Marasiah on Vendaxa , where she and Astraal Vao , a Twi ' lek from the Imperial Mission , were trapped by Talon . Krieg and Draco were able to save them from the Sith with help from Cade Skywalker , the last remaining heir of the Skywalker family . However , the mission revealed Fel ' s presence on Bastion . Sith intrigue . Having established control of Bastion and the surrounding space , Fel ’ s agents approached Admiral Stazi with the offer of an alliance against Krayt ’ s Galactic Empire . The Empire would be represented by Captain Mingo Bovark while the Alliance Remnant would be represented by Stazi himself . Their venue would be the neutral space station known as The Wheel in the Mid Rim . However , the Sith Empire learnt of these secret negotiations and dispatched Calixte , under the guise of her alter - ego Morrigan Corde and Sith assassin Jor Torlin to sabotage the meeting . Their plan involved using advanced technology known as the Command Override Limpet Droid . The C . O . L . D . s would attach themselves to a vehicle ' s hull , hack into the onboard computer , and order it to open fire . After attaching to Bovark ' s " Nune " - class Imperial shuttle , the C . O . L . D . s caused the vessel to open fire on Stazi ' s Alliance shuttle . Warned of the attack over his personal comm unit , Stazi assumed the entire conference had been an elaborate Imperial ruse . This led to a brief scuffle between the Alliance and Fel delegates which ended any possibility of an alliance . Intervening to break up the fight , the station administrator Pol Temm expelled the Imperial delegation , forbidding them or any other elements of Fel ’ s forces from returning . Stazi was allowed to return to his shuttle and depart the station . Meanwhile , Corrde and Torlin resumed their manhunt for Cade Skywalker but turned on each other . In the ensuing skirmish , Torlin was slain . Having learnt about the whereabouts of Emperor Fel following a confrontation on Vendaxa , Darth Maladi , the Director of Sith Intelligence and Assassination , dispatched Darth Kruhl on a mission to assassinate Fel . Aware that a frontal assault on the fortress world would only stretch the entire Sith fleet thin , the Sith opted for dispatching an assassin to deal with Fel . Due to the high level of security , Maladi ’ s operation involved inserting Darth Kruhl onto Bastion by using the defection of Governor Vikar Dorn and the entire crew of the Pellaeon - class Star Destroyer " Dauntless " as a cover . The reappearance of Fel on Bastion had encouraged elements of the Imperial military to defect over to Fel . While Kruhl succeeded in infiltrating the Pellaeon Gardens where Fel was meditating , he was slain during the subsequent duel by the Emperor . Learning of Dorn ’ s deception , he ordered the execution of the entire crew of the " Dauntless " with the exception of Dorn himself who was allowed to return to Coruscant where he was slain by a furious Maladi . Consequently , Fel along with Stazi remained a rallying point for opposition to Darth Krayt ’ s Galactic Empire . Mission to Coruscant . Seeking to atone for turning in fellow Jedi Hosk Trey ' lis to the Sith authorities , former — Jedi — turned — bounty hunter Cade and the crew of the " Mynock " infiltrated the Imperial capital of Coruscant . After evading Imperial security forces and criminals alike , Cade infiltrated the Temple of the Sith and attempted to rescue Trey ' lis . However , they were ambushed and overpowered by Darth Talon and Darth Nihl . In captivity , Cade was tortured while Krayt attempted to coerce the former Jedi to join his One Sith . Burning with hatred towards those who had murdered his father , Cade refused to cooperate . In an attempt to draw Skywalker closer to the dark side , Krayt had his companions Jariah Syn and Deliah Blue infected with Yuuzhan Vong Yorik - Kul coral seeds that mutated their bodies using the dark side . Cade had no option but to help both of his friends by using his anger to cure them at the cost of tapping into the dark side . Bowing to pressure , Skywalker agreed to join the dark side on the condition that Syn and Blue were released . Krayt accepted this deal and subsequently invited Cade with Talon and his most loyal Sith adviser , Darth Wyyrlok , to his chambers . There , Krayt surprised Cade by showing him Kol Skywalker ' s lightsaber encased in transparisteel , giving Cade ' s father a place of honor . Cade was further surprised when Krayt revealed his knowledge about the Jedi and his true identity of A ' Sharad Hett , a Jedi General during the Clone Wars and a survivor of the Great Jedi Purge . Krayt then recited the story of his duel on Tatooine against Obi - Wan Kenobi , near the Lars homestead , and how he was cast out of both Tusken and Jedi society . After some further confrontation , Cade agreed to submit to a Sith training regime under the tutelage of Talon . However in reality , he was pretending to accept their teachings and to escape at the next opportunity . During a session in the Embrace of Pain , Cade managed to free himself and attempted to escape , but was caught by Talon . He was taken back to Krayt , where he was ordered to kill Hosk Trey ' lis or die , but Cade refused to kill the Jedi . Krayt then killed Trey ' lis himself , evoking Cade ' s anger . But Cade then received a vision of his father , telling him " That which can heal , can also break . " . In the subsequent duel , Cade took on Krayt and his Sith acolytes , wounding Darth Nihl . Just as their duel was reaching its climax , Morrigan Corde blasted open the window behind them , shooting Krayt in the back . Cade then jumped out and was rescued by Jariah Syn aboard the " Mynock " , who pulled him inside . The " Mynock " then escaped the planet and jumped to hyperspace , but not before Corde revealed herself to Cade over a comlink . Corde revealed herself to be his mother , but when Cade demanded some answers , she replied that he wouldn ' t be getting any . Unbeknownst to him , Krayt was planning on breaking him , using his power to heal himself and then kill him . Raid on Dac . The planet Dac in the Outer Rim Territories was a key manufacturer and supplier of warships for various galactic powers . Prior to the Yuuzhan Vong War , the planet had been a prominent supporter of the Galactic Federation of Free Alliances , as well as the New Republic and Rebel Alliance that preceded it . Under Imperial occupation , the Quarren had gained control of the planet and the Mon Calamari Shipyards were an important supplier of warships for the Imperial Navy . Despite this , several key Mon Calamari and Quarren leaders were sympathetic to Stazi ’ s Alliance Remnant and provided spare parts , bacta , recruits as well as intelligence . Former Alliance Triumvirate member Gial Gahan learnt that the new Advanced Star Destroyer prototype " Imperious " was undergoing the final stages of construction in the Mon Calamari Shipyards . Capturing the " Imperious " would allow the Alliance Remnant to switch from hit - and - run raids to engaging in full - scale military offensives . Hatching a plan to capture the prototype warship , the local resistance sabotaged the computer systems that controlled the Shipyards automated defense systems , allowing an Alliance task force to enter the system and hijack the new Star Destroyer . However , former Triumvir Gahan was unaware that Imperial Admiral Dru Valan had planned a trap for Stazi ' s forces . Stormtroopers on the " Imperious " ambushed the Alliance commando units while Valan ' s Outer Rim Third Fleet appeared at Dac , trapping Stazi between his fleet and the planet ' s defense systems . Valan contacted Stazi and told him to surrender or die . However , he was unaware that the latter been prepared for his trap all along and had set up one of his own . The Mon Calamari resistance fighter Monia Gahan had seized control of the shipyard guns used them to bombard Valan ’ s fleet in coordination with a barrage by Stazi ’ s forces . The combined fire - power of the Alliance fleet and the shipyard ' s guns inflicted heavy damage on the ships of Outer Rim Third Fleet . Meanwhile , the stormtroopers that had re - seized the " Imperious " were actually Alliance troops under the command of Hondo Karr . They hijacked the Advanced Star Destroyer and got it to one of the Alliance bases . Having achieved their objective , the Alliance evacuated the system . During the ensuing escapade , Stazi ’ s flagship the " Indomitable " was crippled by enemy fire but he managed to escape . Instead , Captain Yorub took command of the " Indomitable " and , despite a desperate barrage of fire from Valan ' s fleet , rammed the ship into the shipyards , destroying a third of them and damaging a quarter . The battle was a major military and political victory for the Alliance . Not only had they escaped with minimal casualties , but they now possessed a ship that could out - gun the Empire ' s best ships . In contrast for the Sith Empire , the battle was a source of embarrassment since it undermined Imperial power . In retaliation for their assistance to Stazi , Darth Krayt retaliated by unleashing a genocidal purge against the Mon Calamari , exterminating one - tenth of them and ordering the rest to be placed in work camps . The first to be executed were the members of the Mon Calamari Council though Quarren dissenters were also targeted . Unbeknownst to both the Alliance and the Sith Empire , Emperor Fel ’ s agents had sabotaged the " Imperious " . Three sets of explosives had been rigged to destroyed the ship as soon as its weapons were brought online , which was expected to occur far enough from the shipyards so that the Mon Calamari would not be blamed . As the Alliance was still considered a potential ally by Fel , Imperial Knights Treis Sinde and Sigel Dare rescued Gahan and , at Gahan ' s insistence , numerous other downed Alliance personnel so that they could reach the Alliance fleet and warn Stazi . Following the operation , Imperial Knight Sigel Dare revealed how to disarm the bombs on the " Imperious " . Impressed by their actions , Stazi agreed to reopen negotiations with Fel ' s forces for coalition against the Sith . Master Sinde remained behind to establish contact with the Mon Calamari resistance . A coup . Despite his position as Dark Lord of the Sith and ruler of the Galactic Empire , Krayt ' s grip on power was also challenged by his affliction . Decades before the Sith – Imperial War , A ' Sharad Hett , who would become Darth Krayt , had been captured by the Yuuzhan Vong and implanted with their Yorik - Kul slave seeds . He eventually escaped captivity and founded the One Sith order which adhered to the Rule of One . In contrast to the earlier Rule of Two which limited the Sith to one Sith Lord and one apprentice , Krayt ’ s Sith order consisted of many Sith subservient to one Dark Lord . Though able to combat the effects of the seeds through his growing strength in the dark side of the Force , Hett was slowly losing his battle with them . By 137 ABY , he had assumed the mantle of Dark Lord and restyled himself as the Dragon of the Sith , but the coral seeds still threatened to turn him into a mindless shell of a man . For years Krayt was able to sustain himself through healing trances and extended periods of stasis , Krayt consulted the holocrons of earlier Sith Lords but was denied any assistance for disregarding the Rule of Two and therefore being a pretender to the Sith legacy . He was looked after by the most trusted of his servants , the latest of them being Darth Wyyrlok the third . Despite being the most learned of Krayt ' s Order in Sith lore and ritual , Wyyrlok was unable to find a way to cure that which afflicted his Master . Thus , he consulted a holocron in his possession , one that belonged to an ancient Sith Lord named Darth Andeddu , who was known to have reanimated his flesh after his own death . Wyyrlok then traveled to the Deep Core to Andeddu ' s homeworld of Prakith , searching for information that would assist Krayt . Wyyrlok managed to find Andeddu ' s Keep , where he encountered a previously unknown Sith cult called the Malevolence — one that worshiped Andeddu and refused to allow Wyyrlok further entry into their domain . In the ensuing skirmish , he killed all the cultists save one named Gerlun , who revived Andeddu ' s deceased corpse at the cost of his own life . Andeddu then engaged Wyyrlok in a duel of Force abilities , a battle that Andeddu ultimately lost . With the ancient Sith Lord dead for a second time , Wyyrlok returned Andeddu ' s body to its sarcophagus and sealed it within . Wyyrlok ' s mission was partially unsuccessful , as he was still unable to obtain any information in Andeddu ' s vast collection of Sith lore that would help him in the preservation of Krayt ' s life . However , he came to the conclusion that Krayt ' s own doubts that he would not achieve his dream of a stable galaxy under Sith rule fulfilled were a significant contributor to his affliction . An opportunity transpired following an attack on the Imperial garrison on the legendary Deep Core world of Had Abbadon by a mysterious female Jedi , Skywalker and a force of Jedi and Imperial Knights . The female Jedi was the ancient Jedi Knight Celeste Morne who had been kept alive by the Muur Talisman — an ancient Sith relic created by the Sith Lord Karness Muur which was capable of turning other sentients into mindless Sithspawn known as Rakghoul s . While the talisman kept Morne alive beyond the natural human lifespan , she was a captive of Muur until he found a Force - strong individual he could possess . The sole survivor was Darth Reave who succumbed to his wounds and became a Rakghoul but not before telling Krayt of Skywalker ’ s presence . Krayt and his advisers then received a transmission from Had Abaddon . Under the guise of the Jedi woman , Karness Muur contacted Krayt and presented him with none other than Cade Skywalker . Muur then issued an invitation to Krayt — one that he was to answer alone , or both he and Skywalker would die . Krayt accepted the invitation , albeit with three of his Sith Lords accompanying him , and set out for Had Abaddon with intentions of capturing Skywalker once and for all . As they traveled to Had Abbadon , Wyyrlok surmised that Muur would not divulge any secrets , and rather sought to control Krayt through his talisman . However , Krayt was desperate to find a cure for himself as his life was nearing its end . On the surface , Muur offered an alliance and began to modify Krayt ' s body . Suddenly , everything was revealed to be a trap , as Cade ' s allies were waiting in secret . Muur , however , took control of Celeste and planned to take Krayt ' s body for his own . During the fight , Krayt was stabbed by Azlyn Rae , electrocuted and Force - pushed off of the cliff by Morne / Muur , and seemingly fell to his doom . At the bottom of the cliff , he was discovered by Darth Wyyrlok , who believing his master to dead , ordered his body to be taken back to Korriban . To his surprise , Krayt woke , having cushioned his fall with the Force . He asked Wyyrlok to take him to a bacta tank in order to regain his strength , but the Chagrian Sith Lord electrocuted his master in response , seemingly killing him . He then placed Krayt ' s corpse in a stasis chamber within XoXaan ' s Temple of Korriban , hiding the truth from the other Sith by claiming that his master had merely been wounded in combat and forced into seclusion . Wyyrlok assumed the position of Regent , claiming to rule on behalf of Darth Krayt and continuing his predecessor ’ s policies including eliminating his opposition and inducting all beings in the galaxy into the ranks of the One Sith . Against a common foe . Following the events on Dac and Had Abbadon , a number of allied systems allowed ships from their planetary fleets to join the Remnant . Admiral Stazi led the fleet of Alliance warships in a joint naval operation against the Coruscant Third Fleet at the Imperial stronghold of Ralltiir with forces loyal to deposed emperor Roan Fel . The purpose of the attack was to capture ships to bolster their fleets and to recruit loyalist Imperials , while at the same time strain the Siths ' ability to maintain control in the Outer Rim . While the Sith fleet commander Admiral Peto Kelsan agreed to surrender his fleet and to kill those who resisted , one ship refused to do so — the " Steadfast " , under the command of Captain Vaclen Tor . Tor who understood Stazi and Fenel ' s plans , refused Fenel ' s orders , causing the Fel loyalist Admiral to ordered all of his Fleet , as well as that of Kelsan , to fire on the " Steadfast " . Kelsan refused to comply with this new order , rescinding his previous order and ordering his crew to self - destruct and abandon their ships . When Fenel ordered his fleet to open fire on the escape pods , Stazi protested and ordered the Alliance fleet to shield the Sith - loyal escape pods and the " Steadfast " . By these actions , Stazi reiterated that his forces would not employ the tactics used by Sith - Imperial forces and was an equal to Fel rather than a vassal . While the allied forces succeeded in forcing the Sith fleet to surrender , this victory was tarnished by differences between Stazi and Edouard Fenel , Admiral of the Bastion Second Fleet . Following the Battle of Ralltiir , Stazi relocated his fleet to the Arkanis sector in the Outer Rim where Alliance forces participated in a mission to evacuate Mon Calamari refugee from Napdu in anticipation of a Sith attack . The local Hutt ruler Azzim Anjiliac Atirue was an ally of the Alliance and was sympathetic to the plight of the Mon Calamari . During this period , Stazi came into contact with surviving members of the New Jedi Order . The Jedi delegates , with the blessing of the surviving Jedi Council members at the Hidden Temple , informed Stazi on their hope to ally with the Alliance against the Sith Empire . In addition , Stazi learned of Cade Skywalker ' s involvement in the assassination of Darth Krayt . While in the midst of negotiations with the Jedi , the Alliance fleet was ambushed by the Sith - loyalist First Coruscant Task Force , under the command of Admiral Krion Grail . During the battle , the Mon Calamari Shipman Tealart attempted to assassinate Stazi but was foiled by the Jedi . The Alliance fleet retreated into hyperspace but was unable to shake - off their Imperial pursuers since the latter were tracking the fleet ’ s comm frequency vibrations . However , Stazi ' s second - in - command Captain Jhoram Bey sprung a trap by using the flagship " Alliance " to lure Grail ’ s forces into the firing range of the re - assembled Alliance fleet . Sustaining considerable damage , the Sith - loyalist fleet was forced to retreat . Victorious in battle , Bey ordered all Galactic Alliance comm frequency vibrations changed before proceeding to the next rendezvous point . Fortunately for the Alliance , Admiral Stazi recovered from his wounds . In the aftermath , Stazi met with Tealart in the " Alliance ' s " brig . Tealart admitted his guilt and explained that Sith agents had contacted him and threatened to kill his entire family on Dac if he refused to cooperate with their plot . With his family threatened , Tealart agreed to cooperate with these agents . While Stazi forgave him and agreed to do his best to rescue his family , Stazi did not pardon Tealart due to the severity of his crime . In accordance with Alliance law , Tealart would be tried and executed for treason . The final protocol . On Dac , the Sith - inspired Genocide had culminated in the deaths of an estimated ten percent of the Mon Calamari population . In an attempt to cower opposition to the Sith , the genocide was widely broadcast on HoloNet . After Darth Krayt left the planet , Darth Azard , a Quarren Sith , was left to oversee the genocide with the aid of Vul Isen , a Force - sensitive Givin Sith scientist . While thousands of Mon Calamari were sent to extermination camps , where they were left without food or medical aid so they would die of disease and starvation , others fled to the deep oceans of Dac , where they were hunted down by the Imperial Army . The Sith - inspired genocide was resisted by the Mon Calamari Rangers , a resistance organization that waged a guerrilla war against Imperial forces and aided in the escape of refugees . The Rangers were aided by Master Sinde , an Imperial Knight . During a brief skirmish , Sinde and the Rangers turned the tables on an Imperial Army patrol under Commander Sturves which included seatroopers , Shark fighters and one Acklay Battle Fortress . The poor performance of Sturves ' forces during this operation exposed a brain - drain in the Imperial military created by the defection of many able officers and personnel to Emperor Fel ’ s Empire - in - exile . Due to his expertise on biological warfare , Isen was assigned the task of overseeing the genocide . Since Krayt wanted only the Mon Calamari eliminated and not the Quarren or any of Dac ' s other native species , Isen would not be able to release experimental viral organisms to wipe out all life on the world . Following some consultation , Isen settled for developing a " Sea Leviathan " — an aquatic variant of the Leviathan — alchemically bioengineered Sithspawn created by Dark Jedi during the Hundred - Year Darkness . The creature , when completed , would be able to eliminate the remaining Mon Calamari on Dac . Though semi - sentient , the Sea Leviathan would absorb the life energies of those it killed , becoming sentient and driving it to think like a Mon Calamari , enabling it to better locate their hiding places . Isen spent weeks developing the creature in the gaping , underwater Soheras Trench , reaching the trench via an Imperial Aquatic Terrain Armored Transport . Following development , the Sea Leviathan was first tested on Mon Calamari inmates at Imperial Extermination Camp 28 . Impressed the efficiency with which the Leviathan consumed its prey , the Sith Leviathan was deployed into the open oceans of Dac to hunt down Mon Calamari refugees and to lure the Rangers out of hiding . Isen and Azard followed the Sea Leviathan in their AT - AT swimmer to Devil ' s Crevasse on Dac ' s ocean floor , where the beast interrupted a reconnaissance mission undertaken by two Mon Calamari Rangers in Krakana underwater fighter s . However , one of the Rangers , Shonmai escaped back to the Ranger Grotto and alerted her fellow Rangers , who were under the leadership of Sinde . While Isen , Azard , and their Sithspawn prowled around Devil ' s Crevasse , the Rangers devised a plan of attack that involved sacrificing the refugees to the Leviathan while they attempted to disable the Sith ' s AT - AT swimmer . They met the Sea Leviathan just as it approached the outskirts of the Crevasse , and a battle quickly ensued . Despite the deaths of many Mon Calamari refugees , the Rangers succeeded in disabling the AT - AT . Further losses were averted by the appearance of the devilsquid — non - sentient fauna which resided within the Crevasse and had been disturbed by the commotion . Before the devilsquid could join in the fray and besiege the refugees , Master Sinde used the Force to command them to attack Sea Leviathan . Unable to withstand the combined assault of the devilsquid , the Mon Calamari Rangers , and the Imperial Knight , the Sea Leviathan was dragged into the abyss of Devil ' s Crevasse , never to be seen again . Only Isen and Azard survived the battle but were undeterred in their resolve to continue the Genocide . Unwilling to squander more Imperial resources on the systematic extermination of the Calamari and bloodied by defeats at Ralltiir and the failed attempted to annihilate the Alliance Core Fleet , Darth Wyyrlok ordered Isen to execute the Final Protocol : the extermination of all life on Dac . This involved contaminating Dac ' s oceans with viral spore s , which would be carried by oceanic currents and kill every life form on the planet within a week . Azard and the pro - Sith Quarren leadership protested , pointing out that the Sith - allied Quarren would also be affected . Wyyrlok was unmoved , though he allowed the Quarren to begin evacuation of Dac without helping or hindering their efforts . Wyyrlok ' s plan was for using a two - pronged operation to deal a serious blow to his Alliance and Fel foes . If successful , the on Agamar would capture Fel and the poisoning of Dac would lure Admiral Stazi and the GA fleet into a trap . Within three days , Dac ' s oceans were covered with the bodies of the dead . This led to the deaths of more than eighty percent of the planet ' s population . However , total annihilation was averted by the efforts of the Alliance and various individuals to evacuate as many survivors as they could . An Alliance fleet entered the Dac system , driving away the weak Imperial defenses and allowing a civilian evacuation fleet to evacuate many refugees . While the bulk of the evacuees were Mon Calamari , the armada also managed to evacuate large numbers of Quarren , Moappa and Whaladon . The Outer Rim Third Fleet attempted to ambush the Alliance and evacuation fleet but were foiled by kamikaze ships loaded with ion bomb s . The arrival of Fel ' s Star Destroyers under General Jaeger forced the Sith to retreat , allowing the allied forces to evacuate twenty percent of the planet ' s population . The hunt for the Butcher of Dac . Word about the Massacre on Dac soon reached Cade . He decided that the " Butcher of Dac " to be the first target of his crusade that would inflict the Sith with a severe blow . Using intelligence from the Sakiyan Naxy Screeger that indicated Isen was located on the planet Daluuj , they raided the Sith scientist ’ s laboratory , but discovered a group of Imperial stormtroopers instead of Isen they were looking for . While Syn planted timed explosives , Skywalker and Sazen engaged a group of Sith before the last remaining Sith revealed to him the whereabouts of both the scientist and his planet - killing toxins . He also revealed only that Isen had previously used Daluuj as a base and had left no secrets behind . The raiding party left the Sith to die when the base exploded . Several Mon Calamari survivors fled from their homeworld to Da Soocha in the remote Cyax system . The Hutt Azzim Anjiliac Atirue owned a spa at the Hutt Temple of Maya Armus on Napdu , the fourth moon orbiting Da Soocha . In response , the Sith Empire sent in the First Sith Imperial Strikeforce under Isen and Darth Azard to punish Azzim for sheltering Mon Calamari by bombing Da Soocha ’ s oceans with deadly toxins . Upon arriving above Da Soocha ' s orbit , the " War Hammer " deployed its Sith - Imperial bombers of Squadron Quad Victor that would drop the deadly toxin into the oceans of Da Soocha ; exterminating all life on that world . These bombers quickly accomplished their mission and return to the " War Hammer " . Azard also ordered the bombardment of Napdu and the secondary deployment of stormtroopers to mop up all possible survivors . Maya Armus was bombarded , killing most of the inhabitants including the Hutt Azzim . Several civilian freighters attempted to escape the Imperial attack but Darth Rauder , aboard her Sith Fury , ordered Skull Squadron to destroy them . On the ground , stormtroopers led by Sergeant Harkas eliminated the remaining survivors . One of his subordinates Corporal Trask showed disapproval of the ethics of his Sith masters ' actions ; but Harkas reasoned that they were only following orders and killed an injured survivor to support his argument . On the Hutt capital Nal Hutta , Azzim ’ s uncle Vedo received a recording of the Sith atrocities on Da Soocha . He subsequently convened a meeting of the Hutt leadership on Nal Hutta to consider entering the war on the side of the Galactic Alliance Remnant and the Empire - in - exile . This was where Cade himself received a transmission from Queen Jool who requested the former ’ s presence at this meeting . There , they hired his team on a mission to kill Isen . Isen and Azard established a laboratory on Utapau , where he experimented on native Utai and Pau ' an subjects . He planned Gar Stazi ' s assassination and a new plague which would adapt to any living species . Skywalker ' s comrades Jariah and Blue subdued Isen ' s assassin , however , while Cade and Sazen confronted Isen and Azard . Isen tried to escape while Cade gave chase . On the ledge , Isen ignited his lightsaber and fought Cade . During the duel , both sensed Darth Krayt , who had been resurrected , and soon after , Isen jumped into the sinkhole to release the vial . Cade leaped afterwards , and using the Force to catch up with Isen , sliced Isen in half before retrieving the vial containing the virus intended to eradicate Utapau , saving the planet . Aftermath . As of 139 ABY , the Temporary Archive for Integration of Materials Related to the Second Imperial Civil War was established on Coruscant . Behind the scenes . The Imperial Civil War is the primary backdrop for the stories of the " " series of comic books , with the exception of , which depicts the Sith – Imperial War and explains how it leads to the latter conflict . When asked whether the events in " Broken " were the same as the Sith – Imperial War , John Ostrander replied , " " Two different wars . In fact , Roan Fel ' s activities might be likened more to an insurgency so far than an actual war . It ' s all been hit and run with him so far , as he notes . " "