"The true Sith have spent centuries building their strength in the depths of unknown space. The Sith Emperor patiently planned for the day when his Sith Empire would repay the Jedi for the humiliating defeats of the past. In that time, generations of Sith have come and gone, working hard and devoting their lives to the dream of vengeance."
―A HoloNet dossier on the Sith Order during the Great Galactic War
The Sith Empire was a rich and powerful empire established by Dark Jedi banished from the Galactic Republic after their defeat at the Battle of Corbos during the Hundred-Year Darkness. These Dark Jedi fled to Korriban, and conquered the Sith people, taking on their name and learning their ways. For two thousand years, this Sith Empire went undiscovered by the Republic. This discovery led to the Great Hyperspace War, and led to the defeat of the original Sith Empire, and the rise of the later Sith Empire of Exar Kun that fought in the Great Sith War, the Sith Empire of the Star Forge and Sith Triumverate that fought in the Jedi Civil War, and True Sith Empire that fought the Great Galactic War. The current Sith Empire is an extension of these Empires, taking their best aspects, and bringing them together under the rule of the Sith Order. The Sith Emperor, also the Dark Lord of the Sith, is the total, unchallenged ruler.
It is through fear that the Sith Empire rules, and mystery, for the known galaxy has no clue of its reconstruction, other than simple myths among spacers that is attributed to fear and exaggeration. Despite that, in Sith Space, the Sith Empire is a very real government ruling its territory with an iron fist, and its citizens too afraid to reveal their presence through fear of the consequences, both from their Sith rulers and the Republic.