Navy, and are fielded like marines separate from the army.

The Death Star, a moon-sized space station (the construction of which is in an early stage at the end of Revenge of the Sith) with sufficient firepower to destroy an entire planet, is designed to be the supreme weapon of the Empire's power. Grand Moff Willhuff Tarkin, the station's commander, shortly after informing the heads of the Imperial Military that Palpatine has dissolved the Senate, demonstrates that power in A New Hope, when he destroys Alderaan merely as a show of force. In the film's climactic scene, however, the station is assaulted by a small force of Rebel starfighters; the battle ends with the Death Star's destruction at the hands of Luke Skywalker. The victory is the Rebel Alliance'sfirst major success against the Empire.

A near fatal blow is struck against the Empire in Star Wars Episode VI: Return of the Jedi. In the film's climactic battle, the Rebellion destroys the second Death Star and a number of capital ships that contain a great portion of the Imperial Navy's highest-ranking officers. During this battle, Vader is redeemed by throwing Palpatine to his death, but is mortally wounded by Force lightning intended to kill his son, Luke.

In the Expanded Universe, the Rebels, renamed the New Republic, fight to claim the galaxy from remaining Imperials styling themselves as independent controllers of portions of the galaxy.

In the Jedi Prince novel series, a group of impostors calling themselves the Prophets of the Dark Side install a three-eyed mutant named Trioculus as