The Sith Order is the sect of the Sith Empire that refers to those who are Force-sensitive, and by that, those who rule the Empire. These members studied and used the mystical energies of the Force; usually, the Dark side of the Force. The weapon of the Sith is the lightsaber, a weapon with a blade made of pure energy. A Sith Acolyte who completes the trials and is accepted as the apprentice of a Sith Lord is considered Sith–no more, no less. Any non-Sith, however, is expected to refer to a Sith as “my lord” out of respect.
- For information on this subject beyond The Old Republic, see: Sith Order on Wookieepedia