Once a Jedi Knight, Anakin Skywalker swore loyalty to Sith Lord Darth Sidious in order to gain the power of the dark side of the Force. Vader betrayed the Jedi Order and his Master, Obi-Wan Kenobi. With the rise of the Galactic Empire, Darth Vader became the Emperor's dark enforcer. He carried out the Emperor's will, and commanded legions of Imperial troops. Vader was tasked with discovering the secret headquarters of the Rebel Alliance, as well as chasing down the Rebels who destroyed the Empire's massive Death Star battle station.
Darth Vader was encased in sinister black armor. The man underneath was mortally wounded in a lightsaber duel, and the dark suit includes extensive machinery to keep Vader alive. The sounds of his mechanical lungs accompany his every step. Such injuries greatly diminished his ability to use the Force, but Vader is still very powerful. He can command the power of the dark side to hurl objects or remotely crush the throats of his victims.