This mid-1920s photograph shows a U.S. Army Air Service pursuit biplane, identified by the fuselage marking 'S.C. 33765,' parked on the apron of a stateside training or pursuit airfield. The 'S.C.' (Signal Corps) designation places the image before the Air Corps' creation in 1926. Aircraft of this type — closely related to the Curtiss P-1 Hawk and PW-8 pursuit series — formed the backbone of America's fighter squadrons during the interwar years, when open-cockpit, fabric-covered biplanes remained the standard front-line design. Project: 218216