In this particular time frame I'll be examining several sources, namely; The Golden Age of the Sith, The Lost Tribe of the Sith (in three parts), The Fall of the Sith Empire, and The Great Hyperspace War.
I've finally received Tales of the Jedi volume 1, and it is here that Star Wars chronology picks up again. It is a full 1900 years since the Dark Jedi were banned from the Republic and retreated to the furthest reaches of space. During this time the Dark Jedi conquered the Sith, and expanded their Empire into the outlaying regions of the system. After years of interbreeding, Jedi blood now runs through the veins of the Sith people. No longer simply Neanderthal type people, the Sith now have a thriving, if not still somewhat primitive, civilization.