Darth Vader leads the Galactic Empire.
Darth Vader . Originally a Jedi prophesied to bring balance to the Force , he falls to the dark side of the Force and serves the evil Galactic Empire at the right hand of his Sith master , Emperor Palpatine ( also known as Darth Sidious ) . Palpatine . In the original trilogy , he is depicted as the aged , pale-faced and cloaked Emperor of the Galactic Empire and the master of Darth Vader .