List of Air Service American Expeditionary Force aerodromes in France
see also: Organization of the Air Service of the American Expeditionary Force When the United States entered World War I on 6 April 1917, the Air Service of the United States Army existed only as a branch of the Signal Corps, and was known by the name of Aviation Section, U.S. Signal Corps. It consisted of 1,120 personnel, of which 65 were officers.