The Aviation Service Act is a U.S. law passed in 1914. It created within the Signal Corps an to replace the Aeronautical Division. It directed the to operate and supervise "all military [U.S. Army] aircraft, including balloons and aeroplanes, all appliances pertaining to said craft, and signaling apparatus of any kind when installed on said craft." The section would also train "officers and enlisted men in matters pertaining to military aviation," and thus embraced all facets of the Army's air organization and operation. The old Aeronautical Division continued to exist, but operated as the Washington office of the new section.