Brotherhood of the Sith The Brotherhood of the Sith or Sith Brotherhood was a group of Jedi Knights led by Exar Kun who broke away from the Jedi Order to study Sith techniques . During the Great Sith War , they received the allegiance of the Krath and the Mandalorian Crusaders led by Mandalore The Indomitable . History . Creation . In an impassioned speech on Ossus , Exar Kun sowed the first seeds of doubt in his fellow Jedi Knights . After the terrible and pointless death of Arca Jeth on Deneba , many Knights had become disillusioned with the Order , losing their idealistic ideas of the immortality of the Jedi . Fearing for the safety of the future , several Jedi Knights were swayed by Exar Kun ' s promise of further " lost " Jedi powers . Unfortunately for the young Knights , Exar Kun was not concerned for the future of the Order and had come to Ossus in hopes of creating a powerful rank of commanders for his impending war with the Republic . Kun ' s trip to Ossus had two objectives . Besides recruitment , Kun was eager to lay his hands on the famed Sith holocron of Odan - Urr . Breaking his way into Odan - Urr ' s chamber , Kun slew the aged Jedi Master and claimed the ancient holocron for himself . Caught in the act of removing the artifact , Kun lied to his new followers , claiming that Odan - Urr had declared him a Jedi Master and bequeathed the artifact to him as a symbol of the induction as he died of old age . With the increasing awe of his fellow Knights , Kun loaded his ship , the " Starstorm One " with his twenty knights and left for Yavin 4 , a place of dark side power . Yavin 4 . Before Kun ' s speech on Ossus , Exar had already visited Yavin 4 and enslaved the Massassi that lived there . Investigating the ruins on the planet and excavating the area revealed the last resting place of the Sith Lord Naga Sadow . Using the labor of the Massassi , Kun created a myriad of temples on the planet to amplify his own force power . It was to this environment that Kun and his followers arrived . Arriving on Yavin 4 , the twenty knights fanned out , becoming increasingly disturbed by the dark presence that they felt on the planet . Leading the company to the main Sith Temple , Exar proclaimed a new time for the Jedi Knights , one in which the old Masters would pass away to make way for the new . One Jedi Knight in particular was thoroughly disgusted with Kun ' s blindness to the apparent dark feeling that he gleaned off the planet ' s surface . Oss Wilum distanced himself from the other admiring followers and made to leave the planet , but was abruptly stopped by Massassi . The other Knights rushed to his aid and it seemed that the Brotherhood would be disbanded before it even began to take form . With some quick thinking , Kun salvaged the situation . Deceiving his followers once again , Kun stopped the attack declaring that he knew of the dark power emanating from the planet and needed the other Knights help in cleansing the world of the dark side . Knowing that Oss Wilum ' s outburst was not likely to be an isolated event , Exar quickly accelerated the indoctrination . Using the Sith holocron that he had taken from Odan - Urr , Exar Kun smashed the artifact declaring that he was doing so to rid it of dark influence . In reality , the action released the dormant teachings of the Sith Lords within . The crystals from the smashed device embedded themselves in Kun ' s followers . Acting as a type of Sith poison , the Knights ' emotions became completely muddled and their reservations about Kun and the dark planet melted away . The Brotherhood was born . The Jedi pogrom . After continued training on Yavin IV , Exar ' s Sith converts had completely embraced their Sith training . Exar had no doubt as to their abilities and was ready to make his move . To the approval of his Sith brethren , Exar declared the Jedi Masters heretics that refused to see the truth of the new way . Before the Sith Golden Age could come , the old had to be removed . Exar sent his Sith disciples on their first mission , to exterminate their own Jedi Masters . The pogrom was a huge victory for the Brotherhood . Almost every one of Kun ' s disciples was successful in their mission , catching their master ' s by surprise with the new Sith techniques taught to them by Exar . However , several masters were adept enough to recognize the corruption within their students and were ready . Master Thon fended off both Oss Wilum and Crado when they used the Force to call vicious Hssiss dragons upon the Tchuukthai Master . Crado was able to escape , but Oss was captured . Zona Luka was able to kill Master Dominus but was also killed in the attempt . Nayama was unable to kill her master Jolee Bindo in a confrontation , and fled in disgrace . The End of the War . With the leadership of the Jedi in disarray , Exar made his next move against the Republic . Determined to utterly shatter the Jedi Order , Exar planned to destroy the Jedi Library on Ossus . Uniting with his apprentice Ulic Qel - Droma , Exar learned of the treachery of Ulic ' s illicit lover Aleema Keto . Exar devised a plan to rid themselves of the nuisance and to ensure the end of the Jedi . Using the treacherous Aleema and the cowardly Crado to set off a supernova in the Cron Drift , Exar ensured the doom of Ossus . Both Aleema and Crado were killed by the supernova for their failings . As the Jedi tried to evacuate Ossus , Exar , Ulic , and the rest of the Brotherhood landed on Ossus to steal as many of the Jedi artifacts as they could . The raid was highly successful , but met a huge setback when Ulic was shot down by his brother Cay and captured . With Ulic ' s capture , Exar retreated to Yavin IV with the Jedi hot on his heels . With a wall of light directed at the planet , the entire planet was enveloped in fire . Exar was presumed killed by the fires and the war was considered over . However , several members of the Brotherhood had survived the war and had holed themselves up in the last Sith stronghold , the planet Empress Teta . In a short but violent campaign , the Republic poured all their resources into ending the Sith occupation of the planet . The Sith were able to hold out longer than anyone expected due to the Sith abilities of the remaining members of the Brotherhood . Eventually , the Republic broke through the Sith lines , slaughtering the opposition . Several Sith were able to escape , but at least one Sith , Nayama , was killed in the battle . A Lasting Legacy . Although the remaining members of the Brotherhood were forced into hiding , at least one Sith lived to carry on the mantle of Dark Lord of the Sith . Another Sith fled to Korriban and set up the Sith Academy there . The academy would be an integral part of the Jedi Civil War when the new Dark Lords of the Sith , Darths Revan and Malak needed a ready supply of Sith disciples . Behind the scenes . There are several other Jedi pictured in training at Yavin IV , but they are unnamed at this time . The video game " Knights of the Old Republic " introduced the Rodian , Suvam Tan who claims to have been a Sith slave on Yavin IV . However , throughout the comic , no slaves other than Massassi are seen on the planet . It is also known that Suvam constructed a lightsaber and was the owner of a Sith holocron and Exar Kun ' s armor at the time of his death . Because of these possessions , it can be inferred that Suvam was probably a part of the Brotherhood . However , once again , there is no hard evidence .