During the Great Galactic War instigated by the resurgent Sith Empire, the battalion was stationed on Coruscant. With the Sacking of Coruscant by the Sith at the end of the war, the 29th, along with the 4th Marine Battalion, was all but destroyed as a combat force. Though the battalion eventually recovered during the Cold War, it was disbanded along with the rest of the Corps as a result of the Ruusan Reformation