BioWare has released an audio timeline detailing events before the peace between the Galactic Republic and Sith Empire in The Old Republic.
The history lesson is told by Master Gnost-Dural, Keeper of the Jedi Archives, played by none other than actor Lance Henriksen.
Not sure how many more of these to expect, but this is called Timeline 1: The Treaty of Coruscant. There are other points of interest on the video as well. Eighteen as a matter of fact.
Watch it here.