A detachment of the United States Marine Corps, consisting of a firing battery and commanded by a colonel, is stationed at Fort Sill. Referred to as the MARDET, the detachment works with the Field Artillery School to train Marine artillerymen. Marines also serve as gunnery and fire support instructors at the Army Basic Officer Leader Course & Marine Field Artillery Officer Basic Course, and as small group leaders at the Field Artillery Captains' Career Course. All Marine artillery officers attend the Field Artillery School, but are trained in separate classes from their Army counterparts.