Information found on wookieepedia can give you the background on Sith and the Sith Empire. Wookieepedia article SW: The Great Galactic War RPG Such cults included the Naddists, the Disciples of Ragnos, and the Krath. Instead, they were founded and made up of Sith devotees and other Force-sensitives dedicated to prolonging the teachings and the memory of the Sith. With such great influence, the Sith religion inspired many cults that weren't technically part of the Sith Order, nor did they consist of actual Sith. Throughout their long history, the Sith commanded several Empires and initiated many galactic wars.

The Sith were the most infamous of all dark side religions, and the members of the cult were often seen as the pinnacle of power within the dark side. The rise of a new leader, or Dark Lord, would often cause drastic reorganizations in the cult, however the Sith would always be characterized by their lust for power and their desire to destroy the Jedi Order. This religious order would survive in many different incarnations throughout Galactic History. Following centuries of interbreeding and mixing of cultures between the aliens and the exiles, the Sith would no longer be identified by their race, but by their dedication to the ancient Sith philosophy. However, they had been defeated and subsequently exiled from known space, which led to their discovery of the Sith species. The Dark Jedi, who refused to rely exclusively on the light side, challenged the Jedi by giving into the dark and starting the Hundred-Year Darkness. These Dark Jedi had once been members of the Jedi Order, a monastic Force religion dedicated to peace through the use of the light side of the Force. The term 'Sith' originally referred to a species of alien native to the planets Korriban and Ziost, who were later enslaved and ruled by exiled Dark Jedi from the Galactic Republic. The Sith Order was a sect of Force-sensitives who utilized the dark side of the Force.

The great galactic war