Sixth Negative Regions Sixth Negative Regions , also known as Black Sword Command and simply the Sixth Army , was a Republic and later Imperial reserve Sector Army charged with the defense of Sector 6 . History . Clone Wars . The Sixth Army , at the time of the Clone Wars , was a reserve command dominated by repair yards and training camps . The Sector Army ' s territory continued that of the First Army ' s half circle in the western quadrant . Besides this , it also had an extended theater of operations intended to guard against threats from the Unknown Regions . As with the Fifth Deep Core Army , many members of the 6th Sector Army were shifted to areas requiring greater need than their assigned sector , often leaving the oversector thinly defended . Imperial Period . Given its location in what could be considered the Core Worlds , it apparently lay at an extreme latitude within the Galactic disk , or else on the edge of the Unknown Regions rather than in the geographical Outer Rim of the Galaxy . Black Sword Command extended through Praxlis and Corridan and enveloped the entirety of the Kokash and Farlax sectors , an area of authority implying that it represented an Oversector . The name " Black Sword Command " referred both to this area of space and to the military forces assigned here , although the latter were sometimes called simply the Black Fleet . Following standard Imperial operation procedure , at least five Type II Orbital Repair Yard s were built throughout Black Sword Command to provide localized maintenance and shipbuilding facilities . Black Fifteen at N ' zoth in the Koornacht Cluster had a reputation as the best yard in the sector , due to the efficiency of the native Yevetha n workers . Disappearance of the Black Fleet . Black Sword is most famous due to the disappearance of a sizable fraction of its fleet forces , which went unnoticed in the anarchy after the Battle of Endor in 4 ABY . Twelve years later , when the New Republic discovered a complete Imperial order of battle aboard the wreck of the Star Destroyer " Gnisnal " , they found that Black Sword Command constituted the most significant gap in their intelligence on the Imperial Fleet : they had lost track of five front - line capital ships and thirty - nine others undergoing construction and repair . None was smaller than a " Victory " - class Star Destroyer , and they included three Super Star Destroyers . To this total were later added five Type II shipyards . At least part of this disappearance was due to the Yevetha . Eight months after the Battle of Endor , the Imperial garrison at N ' zoth received orders from Ysanne Isard to stand down and withdraw into Deep Core , after destroying any non - movable assets in order to prevent a New Republic move on Coruscant . Before Commander Jian Paret could complete the execution of his orders , however , Yevethan revolutionaries led by Nil Spaar seized the Black - 15 shipyard , the Super Star Destroyer " Intimidator " , and the eight other ships under construction there . They ruthlessly wiped out most of the garrison and civilian colony , placed those Imperial citizens that survived in a labor camp on Pa ' aal , and began to work on mastering hyperdrive and turbolaser technology . Due to faulty intelligence , Imperial Intelligence believed the fleet had actually been destroyed at Cal - Seti . Over the next decade and more , the Yevetha completed the Imperial warships they had captured , built many more to the same designs , and supplemented this fleet with modernized versions of their own traditional " Aramadia " - class thrustships . There is some uncertainty , however , about just how many ships and shipyards the Yevetha acquired . Most tellingly , at least twenty of the ships recorded in the information from " Gnisnal " were projected to have left the shipyards by the time the Imperials withdrew the Black Fleet from their Rimward posture , and even with the " Intimidator " in a spaceworthy condition , it is questionable whether the Yevetha would have been able to take her into combat against the five front - line Star Destroyers that remained unaccounted for . While it does appear that the Yevetha acquired at least one additional Type II shipyard , codenamed Black Nine , which they relocated to ILC - 905 and Black Eleven which they relocated to the Doornik - 1142 system , it is not clear if they seized Black Eight , which had been at Wakiza , and which they claimed the Imperials destroyed when they withdrew from that world . Although their comparable claims about Black - 15 were false , the capture of the yard at N ' zoth was made possible by the preponderance of Yevethan workers employed there , which the testimony of Davith Sconn suggests was a unique feature of that yard . Additionally , some confusion about the exact circumstances of the Imperial recall of the Black Fleet must be noted . Rebel historian Voren Na ' al claimed that the entirety of Black Sword was withdrawn eight months after Endor by Ysanne Isard , to defend Coruscant and other Imperial holding in the Core Worlds , but his account errs in confining Black Sword ' s area of operation to the Koornacht Cluster . An addendum to an Imperial report on the Yevetha compiled by Imperial sentientologist Obo Rin ( a section perhaps added by Zeven Mallat of the Imperial Security Bureau rather than Rin himself ) states that the Black Sword Command leadership ordered the ships undergoing repairs in the yards in Koornacht to be pulled out and put into the front line in a bid to stem the New Republic advance , but that they never appeared . However , the orders given to Commander Paret , the garrison commander at N ' zoth , were to destroy all Imperial assets that could not be immediately evacuated , and to move his personnel and spaceworthy ships — meaning essentially the " Intimidator " — not towards Coruscant or against the Rebels , but rather into the Deep Core . This must be seen as early groundwork for Operation Shadow Hand . There is likely some truth in the common claim of both accounts that ships from Black Sword were withdrawn from the Rim for use against the New Republic , but this need not have been directly linked with the decision to abandon N ' zoth and Koornacht . It is known that at least some of the Command ' s spaceworthy ships had already been withdrawn , such as the " Harridan " , the guardship at N ' zoth , which was recalled three weeks before the evacuation order , to fight in a rearguard action at Notak . Moreover , without the diversion of the " Harridan " , even the predominantly Yevethan workforce at Black - 15 would have faced a far harder struggle to take the docks , and it is not known if the other yards in Koornacht had all been stripped of their defending ships in the same way . The Koornacht Crisis . By 16 ABY , the Yevetha had constructed a fleet of around sixty Star Destroyers plus hundreds of thrustships , and with these forces , they initiated a genocidal expansion through Koornacht , known as the Great Purge . However , the surviving Black Sword captives in Camp Pa ' aal , led by Major Sil Sorannan , had devised a plan to take back their fleet . As the New Republic intervened and confronted the Yevethan fleet , the Yevetha recalled the Imperials to assist them in supervising their ships systems and operating technologies that they still did not fully understand . At the climax of the Battle of N ' zoth , Sorannan and his men executed a plan to simultaneously take control of every Imperial warship in Yevethan hands , echoing Nil Spaar ' s own plot thirteen years earlier . Using slave circuits to regain control of the remnants of Black Sword Command , Sorannan ordered the Imperial ships into hyperspace towards the Deep Core , completing their final order thirteen years after it had been issued .