One of the things we like about the lead up to the Star Wars: The Old Republic launch is BioWare's series of timeline videos that explains the political and military background of the upcoming MMO. The fifth holorecord from the Jedi Archive is The Battle of Bothawui which recounts a major Republic victory against the Sith. It also chronicles the last stand of a heroic group of Jedi knights and Republic troopers, who became martyrs in the struggle against the Sith Empire.
If you're following along with the lore of Star Wars: The Old Republic you'll want to watch "The Battle of Bothawui" on the game's official site.