Xerxes was a Human male who held the rank of fleet commander in the navy of the Sith Empire during the Galactic War. Due to his good performance, Xerxes was assigned to the First Defense Fleet, a force tasked with defending the Imperial capital of Dromund Kaas. Serving aboard the dreadnaught Aggressor, he was under the command of Grand Admiral Valion Madrek. In 3,641 BBY, when the Republic Navy attacked the planet, Commander Xerxes and Grand Admiral Madrek initially expected a quick victory. However, a damaged starfighter crashed into the bridge of the Aggressor, killing them both.