Rymar Haddon was a respected fleet admiral in the armada of the Sith Empire who became one of the eleven Grand Admirals appointed by the Sith Emperor in 3,659 BBY. Haddon was born on Dromund Kaas and served in the navy since the beginning of the Great Galactic War. An officer with more than forty years of experience, Haddon oversaw all naval operations for a time, during the Great Galactic War, reporting on their progress to the Dark Council. As a result, he was trusted by many of them, including Darth Howl. For his extensive service, he was offered a promotion to Grand Moff, but the admiral declined, preferring to remain on the front lines. Haddon served as a Grand Admiral for a decade, and later took part in actions during the Cold War, during which he was killed.