While others are filled with myth and drama. Some say 25,000 years ago the Old Republic was formed among the core worlds, and the Jedi Knights first appeared. That this was a long period of galactic peace and expansion instigated by the invention and advancement of hyperspace travel. In myth, it is believed that about 12-15,000 years ago the Sith Empire was born. A large contingent of Jedi Knights obsessed with the dark side of the Force is expelled from the Old Republic. Read more here.