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
86th Air Division mission was to upgrade the air defense capabilities of Western Europe. Unlike other USAFE organizations, the 86th AD had a complex chain of command. Air defense missions were directed by the U.S. Air Force Chief of Staff from The Pentagon in Washington, D.C.. Since the components of the division would be committed to the North Atlantic Treaty Organization (NATO) in time of war, USAFE NATO missions came under the direction of the Supreme Allied Commander, Supreme Headquarters, Allied Powers Europe (SHAPE). Thus all 86 AD units came under a dual command structure. Under NATO, the Allied Air Forces Central Europe