The Battle of Ruusan was the final major engagement of the conflict in the fictional Star Wars universe known as the New Sith Wars. The wars began 2,000 years before the Battle of Yavin and ended after a thousand years of conflict, including internal Sith conflict, and all-out assaults on the Galactic Republic.

The conclusion of the final confrontation on Ruusan led to the apparent extinction of the Sith, the restructuring of the Republic, and of the Jedi and Sith Orders.

The pivotal seventh battle of Ruusan resulted in the most powerful and last surviving Dark Lord of the Sith, Darth Bane, deciding henceforth to concentrate the dark side of the Force in only one master and one apprentice.

This decision allowed the Sith to hide within the Republic until their existence was finally revealed with rise of Emperor Palpatine, whose apprentices included Darth Maul, Darth Tyranus, and finally Darth Vader.

The return of the Jedi Anakin Skywalker, and the eventual death of the Emperor, Darth Bane's reformed Sith Order brought to fruition the "prophecy of the Chosen One who would bring balance to the Force."