The collection contains information pertaining to the history of the US Army Air Corps and the United States Air Force. It includes general history, as well as subject folders on different wings, groups and squadrons. This collection has much information in it on somewhat obscure topics related to the USAF.

Theodore Maculay was a student at the Curtiss Aviation School and was an employee and member of the U.S. Army Signal Corps. As flight instructor, Macaulay regularly submitted names and validations for students to receive certification from the Aero Club of America.