The First Jedi Purge

Introduction
The First Jedi Purge took place some time after the Battle of Rakata Prime, and the end of the Jedi Civil War, from 3,954 BBY until 3,951 BBY. This purge saw nearly the entire Jedi Order disappear from the galaxy; the Order publicly disbanded and most of the survivors were slain by the Sith.

The Sith Triumvirate
During the Sith Civil War, circa 3,954 BBY, Darth Traya, Darth Nihilus, and Darth Sion took command of the remnants of Revan's Sith Empire. After the exile of Traya, Sion utilized his Sith Assassins to assassinate Jedi, while Nihilus would consume the life of an entire planet in search of the Jedi. Nihilus's final attack was on the Miraluka world of Katarr; nearly all of the remaining hundred Jedi died at a meeting that was being held on the planet.

Closure
Despite the Sith's success against the Jedi, the purge was finally brought to an end by Meetra Surik, who not only trained a new generation of Jedi, but also personally killed all three leaders of the Sith Triumvirate in combat. After the conclusion of the purge, the Jedi who Surik trained proved essential to the Order's revival.

After a fierce battle, the Exile succeeded in defeating the Sith Lord but spared her life. Traya refused to give up however, and attacked the Exile again. But the Exile was able to defeat her again, and this time also redeemed Traya from the dark side. Before she gave her life to the Force, Kreia gave the Exile information about Revan's location in the Unknown Regions and about the fates of the Exile's allies and the planets they had visited. Shortly after this exchange, Bao-Dur's remote reactivated the Mass Shadow Generator in order to completely destroy the planet. The crew of the badly damaged Ebon Hawk retrieved the Exile from the Core and escaped the planet.

With the defeat of the Sith Triumvirate and the "restoration" of the Jedi Order, the Exile left the Republic in the hands of her Lost Jedi and began her journey to find Revan in the Unknown Regions.