Pennsylvania - Ambulance drill in Allentown during WW1

Ambulance Drill, U.S.A.A.C. Allentown, PA
1918

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The United States Army Air Corps (USAAC) was the statutory forerunner of the United States Air Force. Renamed from the Air Service on 2 July 1926, it was part of the United States Army and the immediate predecessor of the United States Army Air Forces (USAAF), established on June 20, 1941.