In the 1930s the Air Corps Tactical School at Maxwell Field, Alabama, was the birthplace and nurturing ground for American air doctrine. The work undertaken at the school became manifest in the skies over Europe, the Mediterranean, and the Pacific in the Second World War. Those who studied and taught there were the same individuals who prepared America for war, and then led its airmen into combat. This band of men spawned and shaped the independent United States Air Force in the postwar era. Their influence is still felt today, for they developed the airpower doctrines and institutions that enabled the United States to prevail in the Cold War. Their strategic vision, evolved from the thoughts of Douhet, Mitchell, and Trenchard, is now embodied in the Air Force's notion of Global Reach-Global Power. The legacy of the Air Corps Tactical School continues on with the comprehensive programs of the Air University, the world's premier airpower training institution. From flight within the atmosphere to flight within space, American airmen fly their missions based on principles enunciated in the lecture halls of Maxwell Air Force Base.