Battle of Phaseera The Battle of Phaseera was fought during the New Sith Wars between the Brotherhood of Darkness and the Galactic Republic . In 1002 BBY , the Brotherhood set their sights on the Republic manufacturing world of Phaseera , and an elite unit , the Gloom Walkers , was sent to take out a Republic outpost that guarded a valley leading toward the Republic base camp in Phaseera ' s capital city . Before the Gloom Walkers moved out , one of their number , Sergeant Dessel , staged a mutiny and took control of the unit after knocking out their previous commander , Lieutenant Ulabore . Due to a seemingly impossible display of shooting by Dessel , who had been blinded by a flash canister , the Gloom Walkers succeeded in taking the outpost , paving the way for a Brotherhood victory . After the battle , word of Dessel ' s abilities spread , and he was taken to the Sith Academy on Korriban , where he was trained in the dark side of the Force , eventually becoming Dark Lord of the Sith Darth Bane . Prelude . For 1 , 000 years , the Sith and the Galactic Republic did battle in the conflict known as the New Sith Wars . In 1010 BBY , a former Jedi Master , Lord Skere Kaan , reorganized the Sith into the Brotherhood of Darkness , an army over 20 , 000 strong . The Brotherhood of Darkness began a new campaign against the Republic , scoring many victories . In the year 1002 BBY , the Brotherhood set their sights on the Republic manufacturing world of Phaseera . Thousands of Sith trooper s , including the Gloom Walkers — a unit that had gained prestige after serving with distinction in the battles of Kashyyyk and Hsskhor — were sent to take the planet . The battle . Upon landing on Phaseera , the Sith forces holed up in a jungle on the edge of a narrow valley that was the only route into Phaseera ' s capital city , where the Republic army had set up a base camp . A Republic outpost was set up on a hill overlooking the valley , so that if the Sith attempted to move troops through the valley , the outpost would spot them and signal ahead to the base camp , allowing time for the Republic base to prepare its defenses before the Sith reached the base . Moreover , the outpost had three flatbed gunship s , which would pose a great obstacle for the Sith if they attempted to move through the valley during the day . Seeking to counter these problems , the Gloom Walkers were tasked with going ahead of the main force and capturing the outpost before the Sith army mobilized to assault the capital . However , when the Sith commanders ordered the Gloom Walkers to take the outpost during the daytime , the Gloom Walkers objected , stating that it was a suicide mission . When the Gloom Walkers ' leader , Lieutenant Ulabore , refused to reconsider the orders , one of their number , Sergeant Dessel , knocked Ulabore out and took command of the unit . With Dessel in control , the Gloom Walkers waited until nightfall to strike at the outpost . Under cover of darkness , the Gloom Walkers moved silently through the valley , successfully evading detection by the Republic soldiers in the outpost . Upon reaching the outpost , the Gloom Walkers split into four squads , each using interference box es to jam all transmissions within the perimeter , and surrounded the outpost . However , they were outnumbered two - to - one , and the Republic flatbed gunships were occupied and ready to wipe out the Sith troopers . Seeing no way to take the outpost without heavy losses , a frustrated Dessel attacked the gunships single - handedly , killing all of the Republic soldiers with incredible and seemingly impossible speed and precision , even after being blinded by a flash canister . This stunning display spurred the unit to assault the outpost , and three hours later the Gloom Walkers were victorious , with forty - six Republic soldiers dead and nine Gloom Walker casualties . With their outpost taken out , the Republic troops had no idea that the main Sith forces were marching through the valley toward their camp . The Republic forces were taken by surprise , and the Sith took the planet . Aftermath . After the Gloom Walkers — minus a contingent led by Senior Trooper Adanar , which had been left to hold the outpost — returned to their camp , they were greeted by a bruised Ulabore and a group of Sith enforcers , who brought Dessel to be court - martialed for mutiny . However , word spread about Dessel ' s incredible shooting while taking the outpost ; evidently , Dessel ' s Force - sensitivity had guided him while fighting at the outpost . This led Sith Lord Kopecz to transfer Dessel to the Sith Academy on Korriban , where he was trained in the dark side of the Force . After training at the Korriban academy , Dessel would become Darth Bane , one of the most important and influential Dark Lords of the Sith in galactic history . The Gloom Walkers came to resent Ulabore after this event , as they had grown very fond of Dessel . Just a month later , one of the unit ' s troopers , Lucia , betrayed the Lieutenant when they were ambushed by Republic forces on Alaris Prime . Ulabore was killed in the battle ; shot in the back by Lucia , a fact which the rest of the Gloom Walkers never reported . Behind the scenes . The Battle of Phaseera made its first appearance in Drew Karpyshyn ' s 2006 novel " " . Although " Path of Destruction " is the battle ' s only appearance in " Star Wars " canon , the battle did receive a mention in " " . The battle was first depicted in the 2012 reference book " The Essential Reader ' s Companion " .