Prior to the early 1930s, transport aircraft in the Air Corps had been assigned to air depots and to service squadrons, although provisional transport squadrons had been formed for special projects. By 1932 Major Hugh J. Kerr, Chief of the Field Service Section of the Materiel Division, proposed the formation of a transport squadron at each air depot to act as a cadre for the transport wing the Air Corps proposed to support a field army in the event of mobilization. Major General Benjamin Foulois approved the formation of four provisional squadrons in November 1932.