The United States Special Operations Command (USSOCOM or SOCOM) is the Unified Combatant Command charged with overseeing the various Special Operations Component Commands of the Army, Marine Corps, Navy, and Air Force of the United States Armed Forces. The command is part of the Department of Defense and is the only Unified Combatant Command legislated into being by the U.S. Congress. USSOCOM is headquartered at MacDill Air Force Base in Tampa, Florida.