This is an institutional history of flight training by the predecessor organizations of the United States Air Force. The U.S. Army purchased its first airplane, built and successfully flown by Orville and Wilbur Wright, in 1909, and paced both lighter-and heavier-than-air aeronautics in the Division of Military Aeronautics of the Signal Corps. Americans flew combat missions in France during World War I and during World War II. During this first era of military aviation, the groundwork was laid for the independent United States Air Force. This document is primarily based on official documents that are house in the National Archives and Records Administration. It is the first definitive study of this important subject.