[Boeing P-12Bs, P-12Cs, and P-12Ds]

Photograph of United States Army Air Corps aircraft parked at the National Air Races in Cleveland, Ohio, April 7, 1931. The group includes Boeing P-12B (Model 102B), Boeing P-12C (Model 222), and Boeing P-12D (Model 227) aircraft.

Inscription: "U.S. Army. Cleveland. 'Hawks,' P-12 Bs, Cs and Ds. LM."

Inscription on verso: "Army Boeings and Hawks. Cleveland, April 7, 1931."

Item from page 16 of the LeRoy Milliren National Air Races photograph album, circa 1920s-1930s. Album contains one hundred ninety-eight (198) black-and-white photographs taken at the air races during this time period.