Raid on the Suprosa The Raid on the " Suprosa " was a battle in the Galactic Civil War in which the Death Star II plans were secured . Prelude . The Imperial freighter " Suprosa " was carrying secret Imperial construction data from Coruscant to Bothawui under an XTS contract , under the guise of hauling fertilizer . Black Sun leader Prince Xizor leaked information concerning the construction project to the Bothan Spynet , who learned of the freighter ' s schedule . Spynet leader Koth Melan then turned the information over to the Rebel Alliance through Luke Skywalker and Dash Rendar . The battle . Striking from a hidden Rebel outpost on Bothawui , twelve Blue Squadron BTL - S3 Y - wings , piloted by Bothan pilots and Alliance pilot Ace Azzameen , led by Skywalker , Rendar , and Melan , ambushed the ship as it exited hyperspace . " Suprosa " responded by firing a single diamond boron missile which Rendar hit , but failed to destroy . The missile hit four Bothan Y - wings , destroying them . Six Y - wings were lost in total during the battle . After concentrated fire brought down the " Suprosa " ' s engines , The freighter ' s pilot surrendered , and Rendar and Melan , leading a team of Bothans , boarded the ship in the " Outrider " to capture the supercomputer , which was later determined to be holding the location and plans of the Second Death Star . Infiltration . Rendar ripped through inner defenses and into the hangar . A loader droid , normally used for moving supplies through Imperial hangars , recognized Rendar as a hostile and used its spring - loaded arms against Rendar . Rendar blasted the droid down , and opened the hangar , allowing Luke Skywalker and Koth Melan to land in the ship and secure the plans . Imperial Ambush . After capturing the plans , Koth Melan told Skywalker that the computer was being encrypted and protected by a self destruct device , and that a special Bothan encryption team on Kothlis would be able to access its contents . However , while en route to Kothlis , the party was attacked by the Immobilizer 418 cruiser " Claw " and the " Victory I " - class Star Destroyer " Hunter " . However , the " Claw " was driven off by Blue Squadron , and the Rebels managed to arrive at Kothlis . Aftermath . Although clearly a Rebel victory , the battle was a trap laid by Black Sun and Palpatine . The Imperial data carried by the freighter were the plans to the second Death Star . The plans were , in truth , outdated , and the second Death Star was fully operational , unlike what the schematics read . With the success of the battle , the Alliance had gained trust in the crime lord Xizor . The plans were moved to Kothlis , where Koth Melan and Bothan technicians helped decode the data . A bounty hunter raid , led by Skahtul , captured Skywalker and killed Melan . The plans managed to reach the CR90 corvette " Razor " over the planet , which was attacked by Darth Vader aboard the " Executor " , supported by the " Avenger " , who had come to Kothlis to collect Skywalker as well as to make it appear as if the Empire was genuinely concerned with the loss of the plans , initiating the Battle of Kothlis . Behind the scenes . In the book " Shadows of the Empire " , Luke is credited with disabling " Suprosa " by himself , whereas in the video game , " " , Ace is the one that incapacitates the freighter . For this article , both are assumed to be correct , with Ace keeping the ship from firing its weapons again , and Luke disabling the ship ' s engines . It is important to note however that according to the SOTE novel , there was not enough time to notify Rebel command of the " Endor Project " plans being transferred on the Suprosa . Therefore there is no mention of Ace . The novel implies that other than Luke Skywalker and Dash Rendar , all of the other pilots present were Bothans .