Battle of Yavin 4 ( Empire Reborn ) The Battle of Yavin 4 , also known as the Second Battle of the Jedi Praxeum or Attack on the Jedi Academy , was the battle during the Galactic Civil War in 12 ABY that saw Luke Skywalker ' s Jedi Praxeum defeat Admiral Galak Fyyar and Desann ' s assault force . Pre - battle . After New Republic Intelligence Service agent Jan Ors was presumed killed during a mission on Artus Prime , Kyle Katarn , seeking vengeance , went to the Valley of the Jedi in order to re - establish his connection with the Force . Unbeknownst to him , his ship was being followed by Desann and Tavion Axmis . After being led to the Valley , Desann and Tavion used its latent Force energy to empower several soldiers with Force energies . These unnaturally powerful beings came to be known as Reborn Jedi and shadowtrooper s . The Reborn combined their forces with those of Imperial warlord Admiral Galak Fyyar , and in doing so , gained enough strength to invade Yavin 4 . The Battle . With such a force primed for the attack , Fyyar launched the " Doomgiver " from his base on Cairn Installation . However , Kyle Katarn had infiltrated the Cairn base and was soon on the " Doomgiver " itself . The ship launched , with Kyle Katarn in it , and headed for the Yavin system . On board , Katarn eventually managed to alert Rogue Squadron of the " Doomgiver " , and soon made his way to the detention levels of the ship . After rescuing a still living Jan Ors and learning of the attack on Yavin 4 , Katarn set out to disable the shields . In the shield generator room , Katarn met and battled Galak Fyyar , who was operating a mechanical suit made from cortosis . The duel resulted in Fyyar ' s cortosis suit exploding . After killing Fyyar and disabling the " Doomgiver " ' s shields , Katarn and Ors were able to reach an escape pod and evacuate the doomed ship . With the shields down , Rogue Squadron was easily able to destroy the " Doomgiver " . Despite the destruction of the " Doomgiver " , several of the ship ' s All Terrain Rapid Deployment Pod s were able to launch before the attack even began , and the ground portion of the battle began in the swamps of Yavin . Joining the ground troops was Kyle Katarn , who made his way through the swamps and to the main temple of the Praxeum . The ground force of AT - STs , stormtroopers and specially trained swamptroopers along with a few shadowtroopers encountered heavy resistance in the form of New Republic infantry . In the temple , the force managed to reactivate the temple ' s supply of training remotes to open fire on the Jedi . Upon reaching the Praxeum , Katarn found the Jedi Trainer s and trainees to be holding their own against the invading stormtroopers and Dark Jedi . It was , however , clearly apparent that Desann himself was commanding the landing force and was in the Praxeum . Katarn followed traces of the Chistori Dark Jedi throughout the Praxeum , until eventually finding him in the tunnels beneath the ancient temple . The two confronted each other and engaged in a lightsaber duel . Kyle Katarn killed Desann in the duel . Meanwhile , during the duel , New Republic infantry and the Jedi managed to rout the remaining stormtroopers and Reborn . The battle clearly lost , the surviving Reborn forces surrendered . Aftermath . Fyyar and Desann ' s attack on the fledgling Jedi Praxeum was one of the first real military tests that the New Jedi Order had to face . Despite the victory , Desann ' s apprentice Tavion Axmis still survived as well did several Reborn . They would later attempt to resurrect the spirit of Sith Lord Marka Ragnos . The events of the attack on the Jedi Praxeum also led Kyle Katarn to return to the New Jedi Order . Behind the scenes . The mission appears in the 2002 video game " " .