The Sith Lords
The Sith Lords are rules by the Sith Emperor and it’s Dark Council of twelve members. While the Sith seen in Knights of the Old Republic are followers of an ideal, in The Old Republic the true Sith have come out from deep space after centuries building their strength.
After many years of planning, the Sith’s attack on Coruscant was a success, sacking the city and taking control of major star systems. After the Sith had taken Coruscant, the Emperor signed a peace treaty and left to meticulously pursue his own goals. The Sith Council has overseen the building of their new empire. With some matters handed off to the Imperial Military, the Sith Lords can now focus on recruiting new dark Jedi to their cause.
The Sith homeworld is Korriban and within the tombs of their ancestors, Sith acolytes must prove their worth in possibly fatal trials. Only the strongest will survive.