The Sith Empire was believed to have been destroyed by Republic forces during the second battle of Korriban. Under the leadership of the Dark Lord Naga Sadow, the Empire invaded Republic space during the Great Hyperspace War, but it was defeated. The Sith Empire developed in complete isolation within the Stygian Caldera for two thousand years before it eventually rediscovered the Republic. The Jedi exiles fled to the remote world of Korriban, where, after conquering it, they interbred with the native Sith species through the art of Sith alchemy, beginning a long period of building and expansion. The Sith Empire, later known as the Old Sith Empire or Original Sith Empire, was a rich and powerful empire in the Outer Rim established by Dark Jedi who were banished from the Galactic Republic after their defeat at the Battle of Corbos during the Hundred-Year Darkness. I foresee what will become a magnificent Sith Empire.' ―Sorzus Syn, Dark Lord of the Sith But I am the rightful ruler, for I alone possess the curiosity to translate their secrets and apply them to larger patterns of conquest.
Here we will build a sovereignty of the dark side to overcome millennia of injustice.