Capture of Kalast The final battle in a long search for the Imperial traitor Kalast saw the Empire capture the traitorous Moff . Kalast slipped datacodes for the Galactic Empire ' s superweapon , the Death Star I , which had enough power to destroy entire worlds . Prelude . The search started on Thyferra , where Kalast was commanding a Rebel outpost . He escaped from the destruction of the base due to a miscalculation made by a commanding Field Commander . After putting down the Invasion of Fondor that occurred during the Imperial Army ' s absence from the planet , Darth Vader hired Boba Fett to take down the defenses around Ilum , where native pirates supplied Kalast with weapons . After gathering information from the Pirate leader , the Empire attacked a Rebel Jabiim support unit during a battle at Jabiim , where information was gathered that Kalast owned a Rebel estate over Atzerri . Upon the Arrest over Atzerri , the rogue Imperial fled . Darth Vader and Palpatine started a series of scouting missions across the galaxy with a fleet including Immobilizer 418 cruisers to capture Kalast once and for all . The Hunt . The Imperial Navy engaged the Rebel Alliance Fleet in a string of battles around the galaxy , from Shola to Dantooine to Nal Hutta , destroying several Alliance Space Station s in a determined attempt to find him . They were able to pin Kalast down several times , but failed to effect his capture . After several battles , the final battle commenced which would bring the search for Kalast to an end . The capture . Darth Vader found one of Kalast ' s last remaining strongholds . The Immobilizer 418 cruisers were activated , preventing his escape . As the fleet exchanged fire , combat ships ambushed Kalast ' s flagship , the " Avenger " , and destroyed its shields and other weak points . The vessel thus crippled , an " Imperial - I " - class Star Destroyer swooped in and caught Kalast in its tractor beam , taking the " Avenger " back intact as well . Aftermath . The capture of Kalast would lead to the obtainment of key Rebel information , including the details on the Bothans aiding Kalast in his spying , which would lead to many Bothans dying because of this information . Regardless , the damage was done , and Kalast ' s efforts ultimately were contributory towards the Rebels destroying the Death Star . Behind the scenes . This battle was the tenth mission of the Imperial campaign in the 2006 video game " " . The actual locations and number of intermittent skirmishes can vary widely based on how many systems the Imperial player holds at this point in the campaign . If , for example , the Imperial held every system save for Atzerri , only a single battle over the same system would be required . On the other hand , if several systems were left under Rebel control , catching Kalast would prove very difficult as he could jump between several systems , perhaps very far apart . If , however , the Empire has already conquered every available planet , a bug in the game happens : Kalast ' s fleet appears in orbit of Coruscant and the Imperial space station there changes to rebel control , making the fight against him difficult if it is of high level .