- "It is your duty to learn what I know. It is my duty to learn what there is to teach."
- ―Darth Sidious, to his apprentice Darth Vader
A Sith Master was any member of the Sith sect who instructed an apprentice in the ways of the dark side of the Force. Approximately a millennium before the Invasion of Naboo, the Sith nearly went extinct because of their infighting. As a consequence, the last survivor, Darth Bane, established the Rule of Two, which restructured the sect so that there could only be two Sith at a time, a master, and an apprentice. In the last decades of the Galactic Republic, the Sith Master Darth Sidious managed to reach the highest echelons of democractic power before anointing himself Galactic Emperor.