Revan was seemingly defeated when Malak ordered his own ship to fire upon his master's vessel, effectively usurping him as the new leader of the Sith, while Revan was widely presumed killed. Now at the helm of a massive Sith armada, Revan drove the Jedi Order and Galactic Republic on the brink of total annihilation until a Jedi strike force led by the intrepid Bastila Shan dealt a decisive victory by attacking Revan's flagship.
The two figures were once celebrated Jedi Knights who saved the Galactic Republic during its war against the Mandalorians. As Jedi, the two explored the fringes of the galaxy, both returning after succumbing to the temptations of the Dark Side of the Force. Leading the Sith as they sweep across the cosmos from their home base on the planet Korriban are Sith Lords Revan and Malak. Knights of the Old Republic is set 4,000 years before the prequel trilogy, in the midst of a devastating war between the Jedi Order and the Sith for control of the galaxy.