In the late 1940s, following several assignments and inactivations, 12 AF reactivated on 21 January 1951 at Wiesbaden AB, West Germany, assigned to United States Air Forces in Europe. Twelfth Air Force became the first USAFE formation to be declared available to NATO. Along with French and Canadian air units, 12 AF was part of the Fourth Allied Tactical Air Force, itself part of NATO's Allied Air Forces Central Europe. It included the 21st Fighter-Bomber Wing, located in France, and the 85th Air Depot Wing at Erding in Germany.