Vaiken Spacedock often served as the home base for the Expeditionary Fleet.
The Expeditionary Fleet represented a component of the Imperial Navy within the Sith Empire. This naval force consisted of approximately twelve Harrower-class capital ships, accompanied by numerous smaller Terminus-class destroyers. Darth Malgus held command of this fleet during the period of the Cold War, and they were frequently stationed at the facilities of Vaiken Spacedock. Noteworthy actions undertaken by this fleet included the attack on the Dorin's Sky, as well as the Battle of the Foundry, which culminated in the defeat of the legendary Jedi Master Revan and the subsequent capture of an ancient droid factory.
The initial mention of this fleet occurs in a prologue scene preceding the Hammer Station flashpoint, with subsequent appearances in other flashpoints presented to the player by Malgus. This encompasses the quest sequence for "Call to Arms", which features a mission directed against The Foundry while it is under the control of Revan.