Attack on Thyferra The Imperial attack on and occupation of Thyferra took place during the Galactic Civil War around 1 ABY . The attack — the culmination of several weeks of planning by Moff Kohl Seerdon ' s to capture the Rebel Alliance ' s bacta supply — was crippling to the Alliance ' s pharmaceutical resources . Although Seerdon ' s military resources were greatly diminished by repeated guerrilla strikes from the elite Alliance starfighter wing Rogue Squadron , he was able to invade the planet relatively easily by manipulating the Alliance to divert their military to the Sullust system . Rogue group was quickly dispatched to reclaim the bacta supply . A fierce battle took place , in which the Rogues succeeded in driving the Imperial forces off the planet , with some minimal civilian casualties . In a last ditch effort , Seerdon joined the battle in his custom " Sentinel " - class landing craft to personally confront Luke Skywalker , the Commander of Rogue Squadron . Skywalker bested Seerdon in the ensuing dogfight , effectively ending the Thyferra occupation . Prelude . The Imperial Moff Kohl Seerdon had been in the planning stages for an attack on Thyferra for some time . Intel of the Rebel Alliance quickly picked up on this , and so a string of raids on Imperial territory , spearheaded by Rogue Squadron , led by Luke Skywalker , was commenced in an effort to reduce the cunning Moff ' s resources . A raid on the Imperial tibanna gas platforms on the gas giant Taloraan drastically reduced Seerdon ' s firepower , as tibanna was used to power blasters . Around the same time , a raid on Fest took place resulted in the destruction of Seerdon ' s weapons research facility and the theft of three AT - PT walkers . This operation , in particular , enraged Seerdon , who quickly responded with an attack on a Chandrilan city , home of Mon Mothma , the Chief of State of the Alliance . In retaliation for the sudden attack on Chandrila , Rogue Squadron struck at the massive Capacitor situated in a volcano on Sullust . The operation , engineered by Kasan Moor , an Imperial defector who had extensive knowledge of Imperial ground operations , was a success , and the Capacitor was destroyed . The attack . While the Alliance forces were stationed on Sullust , Seerdon gathered whatever men and resources he had left and led his final attack on Thyferra . The Alliance ' s bacta supply was quickly overrun , and a massive ground force was installed in the area . General Carlist Rieekan of the Alliance notified Rogue Squadron of Seerdon ' s actions , and Rogue Squadron was quickly deployed to reclaim the bacta . The ensuing battle between Rebel and Imperial forces was disastrous for the Imperials : not a single walker , TIE / LN starfighter , turbolaser encampment , or stormtrooper bunker survived the battle . The Imperials experienced at least 55 casualties ; in stark contrast , Rogue Squadron only lost one X - wing , and even with that the pilot , Kasan Moor , managed to survive the crash . While defending the bacta tanks , Rogue Squadron proceeded to demolish a nearby Imperial bunker , and proceeded to retrieve seeker cluster missiles in the remains . After the entire Imperial garrison in the area was wiped out , Moff Seerdon decided to confront Commander Skywalker personally . He arrived on the planet in his custom " Sentinel " - class landing craft , modified for combat purposes . Challenging Skywalker to a one on one dogfight , Seerdon battled the Rogue commander in the skies over his ruined army . As the firefight went on , Seerdon tried to convince Skywalker that he was too talented to waste his prowess with the Alliance and offered him a spot in the Imperial Navy . As it became evident that Skywalker ' s piloting prowess outclassed Seerdon ' s , Seerdon vowed that even if the Rebellion won the day , the Empire will still eventually crush the Rebellion . Shortly after , his shuttle exploded in mid air . Aftermath . With the battle won , the Rebel ' s bacta supply was effectively secured . With only one X - wing lost during the battle , Rogue Squadron was further cemented as the Rebellion ' s premier task starfighter squadron . Behind the scenes . This " " level foreshadows the Bacta War , another conflict between Rogue Squadron and wayward Imperial forces bent on controlling the galaxy ' s bacta supply , seen in the novel " " .