The Sith
The Sith are an organization in the Star Wars universe, whose members are dedicated to the dark side of the Force. Its individuals, known as Sith Lords, traditionally used Sith Darth title before their name. The Sith are the archenemies of the Jedi, and like them, their main weapon is the lightsaber. Only two at a time: a master and an apprentice, and are the main antagonists of the series of Star Wars movies, as well as in many other Expanded Universe works. There explains that the Sith were created two thousand years before the events of the Phantom Menace, when a renegade Jedi believed that the true power of the force was on its dark side, and that the denial of power was a waste.