Cold War The Cold War was an intense , eleven - year standoff between the Sith Empire and the Galactic Republic after 3653 BBY . The Treaty of Coruscant ended the Great Galactic War , sealing the Sith Empire ' s victory and its annexation of almost two thirds of the known Galaxy . Peace was gained , but tensions between the Empire and the Republic remained high , especially as the Sith began seizing more planets in the Core Worlds . In the ten years after the war , fear and uncertainty gripped the galaxy . Border skirmishes and between the Empire and Republic erupted , and the uneasy truce between the two foes appeared to be on the verge of collapse , as it finally did in 3642 BBY . The twelve year period during which the Cold War took place was perhaps one of the most significant periods in galactic history , particularly for that of the Sith . As a result of the immense power that they held during the Cold War , this was well - regarded as having been the time in which the Sith were at their mightiest . History . The terms of the punitive Treaty of Coruscant called for an immediate cease - fire and the withdrawal of all Republic and Jedi forces from battlefields across the galaxy . As the Treaty went into effect , worlds once allied with the Republic were left defenseless and were quickly absorbed by the Empire . Coruscant was also placed under the rule of the Sith Empire for a short time . As the Jedi returned to their ruined temple on Coruscant , they were met by anger on the part of the Senate , who placed blame for the war at the feet of the Jedi Order . The Jedi — unable to stay on Coruscant , where public opinion had turned against them — relocated to the world of their origin , Tython . Although his Empire was stronger than ever , the Sith Emperor no longer seemed to desire total conquest . He handed over control of the Empire to the Dark Council , a body of twelve Sith Lords who would oversee the day - to - day affairs of state . The Dark Lord went on to pursue his own mysterious goals as the Sith consolidated their power . Border skirmishes and proxy wars between the Empire and Republic erupted , and the uneasy truce between the two foes appeared to be on the verge of collapse . The conflict included small battles in the Outer Rim and other conflicts fought by proxy . One such conflict was the Civil War on Ord Mantell between the corrupt planetary government that remained loyal to the Republic and a guerrilla force of separatists wishing to secede . Although the situation could easily have erupted into another galactic conflict , neither side was ready to wage a full - scale war . During the Cold War , Kel Dor Jedi Master Gnost - Dural made a record of the events surrounding the treaty at the behest of the Jedi Council on Tython . New heroes emerge . During the Cold War , both the Republic and Empire gained four new , powerful heroes . On Tython , two incredibly talented apprentices , a Consular and a Knight , arrived and were trained , both becoming notable participants of the war and contributing greatly to the Republic . The Consular began by saving the Tythonian Forge from destruction at the hands of Nalen Raloch , and successfully gathered three of four holocrons , and found the Fount of Rajivari , which contained the contents of the fourth holocron , and more . The Consular then saved the Jedi Order from internal destruction by learning an ancient shielding technique when several Jedi Masters became infected by an ancient , dark plague . Successfully learning the technique , the Consular healed the afflicted masters and tracked the plaguemaster to a lone flagship . The plaguemaster , Lord Vivicar was defeated , and the spirit of Terrak Morrhage was expelled from his body . The Consular was then named the third Barsen ' thor in the history of the Jedi Order . The Knight first began helping the Jedi Order by defeating the Flesh Raider s and two Dark Jedi , Callef and Bengel Morr , who were responsible for controlling the Flesh Raiders during the events of the Flesh Raider uprising . The Jedi Knight then followed up with victories against the Sith , pursuing enemies across the galaxy , such as Tarnis , a Sith Lord under the disguise of a doctor . When Tarnis was slain , his father , Darth Angral , bore a personal grudge against the Knight during the resulting Desolator crisis . When Angral decided to unleash a powerful superweapon on Tython in order to destroy it , the Knight was responsible for defeating Angral , destroying the Desolator and protecting Tython . Due to this , the Knight earned the title " Hero of Tython . " Simultaneously , a trooper was assigned to Havoc Squad on Ord Mantell . Havoc Squad ' s commander , Harron Tavus , soon betrayed the Republic and defected with the rest of Havoc Squad except for the new trooper . As the only remaining member of Havoc Squad , this trooper became the new commander and was assigned to track down the traitors while the squad was rebuilt . A smuggler also arrived on Ord Mantell , delivering a shipment of weapons . The smuggler was immediately betrayed by Skavak and was accidentally involved in the hunt for the lost treasure of Nok Drayen , the legendary pirate and thief . The smuggler eventually claimed Nok ' s reliquary for themselves and , with Risha Drayen , went on to become a legend in the criminal underworld . Working as a privateer for the Republic , the smuggler eventually exposed Imperial agents in the Senate and defeated the Imperial admiral known as the Voidwolf . By accomplishing that , they gained the name " Voidhound " and claimed a massive pirate fleet and criminal empire , continuing to support the Republic . Champions of the Empire . At the same time that the heroes of the Republic came to light , four other exceptional individuals aligned with the Empire . Two of them , one a former slave and another a Sith Acolyte , were sent to Korriban and taken under the wings of Darth Zash and Darth Baras , respectively . The slave was sent into the dark pits of the tombs on Korriban to prove themselves worthy of being Sith . All the while , they dodged several attempts on their life by their overseer , Harkun . After gaining their apprenticeship , they went on to become a powerful Sith Inquisitor and recovered the ancient relics of Tulak Hord . At the same time , they fought many battles for the Empire across the galaxy . After defeating their master , Zash , they were named a Lord of the Sith . They were given the name Lord Kallig , and established their own power base within the Sith Order and Imperial society . Meanwhile , the other became a potent Sith Warrior . They served their master in combating his nemesis , Jedi Master Nomen Karr , and tracking down his padawan . They traveled across the Empire and saved their master ' s network of spies across Republic and Hutt Space . They succeeded in bringing down many Republic allies and Jedi in their mission . After defeating Nomen Kaar , they were rewarded with the title of Sith Lord and went on to serve their master against the Republic and Jedi . The other two , the Imperial agent Cipher Nine and an unidentified bounty hunter , appeared on Nal Hutta , the former working on a mission to secure Hutt support for the Empire , and the latter to gain sponsorship in the Great Hunt . Cipher Nine gained the title of Cipher after performing successful missions for Imperial Intelligence . After they departed Dromund Kaas , they spent the Cold War tracking down and eliminating terrorists in the Empire . After defeating all the terrorist cells and their leader , they secured the Empire against further internal attacks and gained prestige . Meanwhile , the bounty hunter became engaged in a bitter contest across the galaxy . All the while , they battled the attempts by a dishonorable Mandalorian named Tarro Blood to sabotage them . After killing Tarro and the Jedi Kellian Jarro , they were named the Grand Champion of the Great Hunt and were welcomed into the Mandalorians by Mandalore himself .