Timeline 7: Peace for the Republic?

Timeline 7: Peace for the Republic? is the seventh in the series of in-universe videos, providing backstory for the upcoming Star Wars: The Old Republic video game. The video is presented in the form of a record entry made in the Jedi Archives by Jedi Master Gnost-Dural.

Plot summary
''The centuries immediately preceding the Great War were thought to be one of the most peaceful eras in Republic history. As he dives deeper into the galaxy’s history, Master Gnost-Dural discovers new evidence that suggests the dark influence of the Sith Empire was seeping into the Republic even then. Gnost-Dural’s latest report isolates one historical incident which suggests there was a Sith Lord pulling strings within the ranks of the Jedi decades before the war even began.''

''BTC 103 – More than a century before the Sacking of Coruscant, two Jedi scholars embarked on a journey which became one of most inexplicable mysteries of its time. Young Jedi Knight Eison Gynt joined his Master in a mission to investigate the Ancient Sith Temple of Yavin 4. On Yavin, the pair was attacked by the native Massassi and driven into the Tomb of Naga Sadow where a powerful force of darkness emerged. Gynt’s Master returned to Coruscant wounded and half-insane, remorseful that young Eison Gynt had been killed in the chaos. Years later, however, Gynt returned from Yavin on his own and attacked his former Master. Gynt was killed and all assumed that he had been tainted by the darkness on Yavin 4 and returned to Coruscant for revenge. Nonetheless, the truth, as Master Gnost-Dural has discovered, may have been far more sinister.''