Assault on Yavin 4 The Assault on Yavin 4 during the Galactic Civil War in 12 ABY , saw Luke Skywalker ' s Jedi Praxeum defeat Admiral Daala and Vice Admiral Pellaeon ' s assault force . The battle . Prior to the battle , Kyp Durron and Dorsk 81 arrived back at the Praxeum to warn of Daala ' s assault fleet . They hardly had time to prepare , and , within moments , Pellaeon had arrived with a fleet of seventeen Star Destroyers with orders to destroy the Praxeum . Daala was only hours behind the vanguard fleet in her mighty , jet - black Super Star Destroyer , " Knight Hammer " . Despite Luke Skywalker being absent , the Jedi Knights defended against the larger enemy force valiantly . Kyp , Dorsk 81 , Kam Solusar , Tionne , and the many other Jedi trainees would fight individual battles with the Imperial forces . However , they realized that they could not hold out forever against such a massive force . Having gathered for a last stand at the Great Temple , Dorsk 81 suggested to his fellow Jedi that they combine their Force powers similar to what they had done with the spirit of the Dark Lord Exar Kun . Having cited Yoda ' s famous quote that " size matters not " , he suggested targeting the orbiting Imperial fleet . The Jedi then channeled their combined Force powers using Dorsk 81 as a conduit . This produced a powerful blast that drove Pellaeon ' s entire fleet from Yavin 4 . However , the surge of power was too great for Dorsk 81 ' s body to withstand , and he died as martyr for the Jedi Knights . When " Knight Hammer " arrived for the second assault wave , Daala could not locate Pellaeon ' s fleet . Undeterred , she launched yet another assault wave bombarding the jungles of Yavin 4 from space . At that time , the " Millennium Falcon " arrived with Luke and Callista Ming . While Han , Chewbacca , and Leia stayed on the " Falcon " to join on the attack on " Knight Hammer " , Luke and Callista landed on Yavin 4 to join the Jedi trainees in the defense of the Praxeum . Despite still bereft of her Force powers , Callista proved a good fighter . As the Jedi continued their defense in the burning jungles , Callista became separated from Luke . Seeing her chance to do something great , Callista hijacked a TIE bomber and flew towards " Knight Hammer " . Having bluffed her way onboard the massive starship , she landed in one of the rear docking bays , near the starship ' s massive engine systems where thirty other unused TIE Bombers sat idle . She then aimed the fighters toward the adjacent engine banks , setting them to fire their missile payload . All that was left was to ensure that the Imperial Leader went down with her ship . Callista headed toward the bridge , and to Daala . Meanwhile , both sides had reinforcements : a task force under Admiral Ackbar arrived to aid the Jedi , and twenty Crimson Command star destroyers under Colonel Cronus to support Daala . As Callista had hoped , the charges exploded and set off a chain reaction that ripped out " Knight Hammer ' s " engine chambers , crippling the ship . The ship was then dragged by the immense gravity of the gas giant Yavin Prime . A shocked Daala was helpless to prevent the destruction of her flagship , and her only hope was to reach Pellaeon ' s fleet . Having ordered an immediate mass evacuation , Daala rushed to the executive command pods to escape where she was confronted by a lightsaber - wielding Callista . The ancient Jedi ' s growing anger allowed her to tap into the dark side , though she desperately tried to hold back since she had promised Skywalker never to fall . Her hope of stopping Daala met with failure , however , as the warlord incapacitated her with a stun blast , and escaped the dying " Knight Hammer " . Meanwhile on Yavin IV , Luke realized that Callista was not with him and suddenly realized through the Force that she was onboard the " Knight Hammer " and had regained her Force abilities . He then looked up , and subsequently saw " Knight Hammer " plunge into the gas giant Yavin , burning as swarms of escape pods flew in all directions . He later learned that Callista had managed to escape from the burning wreck on one of the escape pods . However , instead of returning to Luke and the Praxeum , she escaped into hyperspace vowing never to return until she had learned how to control her anger . Aftermath . On the fringes of the Yavin system , Pellaeon regrouped his crippled fleet and retrieved as many of the " Knight Hammer ' s " escape pods as possible . Having rescued Daala , his fleet escaped into hyperspace before any New Republic reinforcements could arrive . With her plans foiled , Daala resigned her rank , handed command of her forces over to Pellaeon , and retired .