the source of evil in the Star Wars universe, usually involving members of the fallen
Sith Empire, trying to resurrect it. In the latter movies, the Empire is reborn by
Palpatine and
Vader.
Darth Maul, Palpatine, Vader, Dooku, Revan, Malak, and anyone else who ever used a red lightsaber are members of the
Sith Empire. Darth
Vaders theme song is also known as the
Imperial March