18th Army Group was commanded by General Sir Harold Alexander and came under General Dwight D. Eisenhower, Commander-in-Chief AFHQ.
Headquarters MTOUSA and General Headquarters CMF formally separated from AFHQ on October 1, 1945, leaving AFHQ to consist of a small interallied staff responsible for combined command liquidation activities and commanded by Lieutenant-General Sir William Morgan as Supreme Allied Commander Mediterranean.
It also was used as a command post for Allied Forces Command (AFHQ) for Free French, British and United States ground forces in Algeria in February 1943, under the command of General Sir Harold R. L. G. Alexander to coordinate the actions of the United States First Army advancing from the west and the British Eighth Army, advancing from the east against the German Afrika Korps.