Supreme Headquarters Allied Powers Europe government offered Camp Casteau, a 2 km² Belgian Army summer training camp near Mons, which was an area in serious need of additional economic investment. In September 1966, NATO agreed that Belgium should host SHAPE at Casteau. SHAPE closed its facility at Rocquencourt near Paris on 30 March 1967, and the next day held a ceremony to mark the opening of the new headquarters at Casteau. The drawdown of the British Mediterranean Fleet, the military difficulties of the politically decided command structure, and the withdrawal of the French from the military command structure forced a rearrangement of the command arrangements
United States Army Europe was located in Versailles, France, just outside Paris. As Eisenhower and his staff began to prepare for the occupation of Germany, the ETOUSA headquarters staff moved to Frankfurt, Germany, and co-located with the Supreme Headquarters Allied Expeditionary Forces and the Office of Military Government, United States. ETOUSA was redesignated Headquarters, United States Forces European Theater (HQ USFET) on 1 July 1945, with its headquarters remaining at Frankfurt. At the end of the war, the total U.S. Army strength in Europe was 2.4 million: two Army groups (6th and 12th), five field armies (First, Third, Seventh, Sixth and Ninth), 13 corps