Battle of Devil ' s Crevasse The Battle of Devil ' s Crevasse was a battle of the Second Imperial Civil War that took place in 137 ABY in Devil ' s Crevasse on Dac . The battle was fought between the forces of Darth Krayt ' s Galactic Empire and the Mon Calamari Rangers , the latter with the aid of Master Treis Sinde of the Imperial Knight s . It resulted in the defeat of the Sith and the death of the Sea Leviathan . History . Prelude . Darth Krayt , the Dark Lord of the Sith , had ordered the genocide of the Mon Calamari to punish the species for supporting Galactic Alliance Remnant Admiral Gar Stazi , particularly for Gial Gahan ' s role in the Alliance theft of the " Imperious " - class Star Destroyer " Imperious " . In the following weeks after the initial massacre of the Mon Calamari Council , the Mon Calamari were placed in forced - labor camps , where many died of disease and starvation . Some Mon Calamari managed to escape underneath the planet ' s oceans . To continue the genocide , the Sith Empire used a number of underwater craft to wipe out all the refugees . But the Empire had numerous encounters with the planet ' s native resistance units : the Mon Calamari Rangers . The Rangers , in turn , were joined by Imperial Knight Treis Sinde , who acted as a warrior and military advisor for one of the ranger units . To further the genocide , Darth Wyyrlok suggested to the Sith Scientist Vul Isen that he create a Leviathan that could move underwater . With this advice , Isen created a Sea Leviathan . After demonstrating its power by unleashing it on one of the work camps , Isen and Darth Azard , the Sith Lord in charge of the genocide , set out with the Leviathan to exterminate the Rangers , heading for a spot where an Imperial unit was defeated by the Rangers earlier . Battle . A Ranger patrol ran into the Leviathan , and only one survived to warn the Rangers . While Tanquar , the Ranger unit ' s leader , wanted to immediately confront it , Master Sinde advised against it . The Sith were setting the Leviathan on a group of refugees to try to draw the Rangers out so they could be killed . After briefly arguing about the situation , Sinde came up with a plan to deal with the Leviathan . When the Leviathan and the transport carrying the Sith arrived at the Rangers ' base , the Rangers , as expected , swarmed out to meet them . But to Azard ' s surprise , the Rangers attacked the transport rather than the Leviathan . Isen thought this was a foolish tactic , since the rangers ' Krakana underwater fighter s weren ' t built to destroy their transport . Azard gave the order to fire on the Rangers . The Leviathan , meanwhile , attacked the refugees and the Rangers escorting them to safety . At that moment , a large swarm of devilsquid emerged from a nearby crevasse . But instead of attacking the Mon Calamari , the squid swarmed the Leviathan , having been commanded by Sinde to do so . The Imperial Knight also joined the attack on the Leviathan . When the Sith noticed the Leviathan was in trouble , Azard ordered for the transport to launch their fighters to deal with the Rangers while the transport attacked the squid . But when they lowered the shielding to do so , one of the Rangers rammed her vessel into the hangar , causing an explosion that destroyed the transport and causing the head of it to sink to the bottom of the ocean . Meanwhile , Sinde was rescued by another Ranger while the Leviathan was pulled into the squids ' lair inside the crevasse , where it was most likely eaten . Aftermath . Isen and Azard , having both been inside their transport ' s head when it was destroyed , survived the explosion . Azard , however , was secured to a chair . Isen took up Azard ' s lightsaber and used it to free his fellow Sith , much to Azard ' s surprise . Sinde later contacted his Emperor , Roan Fel , and told him that their forces should be prepared to deal with Leviathans in case the Sith unleash more of them . Behind the scenes . The battle was featured in the 2009 comic " " , which was written by John Ostrander with art by Omar Francia . It was the second and final issue of the " " story arc of " " .