The Tusken Raiders are minor villains featured throughout the Star Wars saga. In their first appearance in episode four, they were referred to as the Sandpeople. They are nomadic bandits who live on the fringes of society on the desert planet Tatooine.
The Original Trilogy
Episode IV: A New Hope
The Tusken Raiders make a brief appearance and are referred to as "sand people." They beat up Luke Skywalker, partly disassemble the droid C-3PO, and almost kill Luke before being scared off by Obi-wan Kenobi.
The Prequel Trilogy
Episode I: The Phantom Menace
They make an even briefer appearance here, firing off shots at the Pod Racers competing in the Boonta Eve race.
Episode II: Attack of the Clones
A group of Tusken Raiders kidnap Shmi Skywalker. Her son Anakin comes to find her, and she dies in his arms. Anakin then terminates the whole clan, men, women, and children, in revenge, leading him down the path to the Dark Side.