Sith--An ancient cult that uses the Dark Side of the Force. Masters of alchemy and illusion. Once they "were mighty Jedi of the (old)Republic, brothers in the Force, but the Great Schism between the Dark Side and the Light turned Jedi against Jedi." Driven off, exiled, they fled to the far side of the galaxy where they found the Sith people who treated them as gods. After many centuries the Sith empire grew to a vast, rich realm. That was the Golden Age of the Sith . . . until Naga Sadow tried to conquer the Republic and add it to the Sith empire. Sadow's invasion was defeated, but at great cost to both sides, and the Sith empire fell into disarray and all but vanished . . . until Exar Kun rediscovered it. Kun's rise to power started the galaxy-wide Sith War, but he too was defeated and the Sith vanished again. After another resurgence of the Sith by rouge Jedi, Darth Bane reshaped the Sith order and kept it going, hidden from the rest of the galaxy. The Sith believe that true power comes not from the Light, but from the Dark Side; and that power unused is power wasted. They are unmerciful in using any means necessary to reach their goal. Not all dark side Force users are Sith followers; the Force is omnipresent while the Sith are only one following of the dark side, albeit the most powerful and well known.

Dark Lord of the Sith--Traditionally, the titular master of the ancient Sith people. A Jedi who has turned to the dark side of the Force. The title of Dark Lord was passed down from one generation to the next, with only one Dark Lord existing at a time. The mummified remains of the Dark Lords are preserved on Korriban. There could be any number of Sith Lords but only one Dark Lord at a time. Later, when Darth Bane instigated the policy of only two Sith Lords at a time, a master and an apprentice, both sometimes took the title of Dark Lord. All Sith Lords have one thing in common: the desire to conquer the galaxy.

Darth--Title taken by Sith Lords. Early Sith Lords did not carry this title as it had not been created yet, but then later Lords took the title as they saw fit. From Darth Bane onward, all Sith Lords took the title Darth. This is also the time when the tradition of one master one apprentice began.

Massassi--An Ancient race of half-civilized warriors on Yavin Four, descended from the Sith followers of Naga Sadow. They were purposefully mutated by Sadow's magic in order to provide a race of fearsome warriors to guard the temples which stand as Sadow's legacy. The Massassi use the dark side of the Force to control and guide their primitive weapons. They were eventually conquered by Exar Kun.