The Eternal Alliance, or simply the Alliance, was a military organization formed by the Outlander. The Alliance was initially a resistance movement to the formerly dominant Eternal Empire and sought to overthrow the tyrannical Emperor Arcann, and later Empress Vaylin. Eventually defeating both Arcann and Vaylin, the Alliance would seize the throne after defeating the last forces of the Empire in the Battle of Zakuul. The Alliance would then be reorganized by the Outlander, and transformed into the Eternal Alliance. All military assets of the Eternal Empire, including its enormous fleet, would be absorbed into the Alliance. With control of the Eternal Fleet, the Alliance was a force to be reckoned with and was considered the most powerful faction in the galaxy.