One of three D.XIs delivered to the US Army Air Service, probably seen at McCook Field. Photo from: US Air Force

XB-1A 40125 had a semi-monocoque veneer fuselage and was built at the McCook Field Engineering Division in July 1919, shown here with the project number 90 on its tail; 40 more were produced for the U.S. Army by Dayton-Wright in 1920. Scanned from an original reproduced photograph from my collection, date and photographer unknown.

The first GMB delivered. Photo from: National Archives at College Park, Maryland

Possibly the prototype which went into limited production with 30 delivered to the US Army Air Service. French design, US built. One sent to France for evaluation. Photo from: National Archives at College Park, Maryland

Possibly a prototype under evaluation with other aircraft by the US Army Air Service. The US Navy became the main operator. Photo from: National Archives at College Park, Maryland

How about having the Soviet Union, the United States and Germany in your order book! Fokker achieved this with the D.XI fighter, although Germany's order was cancelled and taken up by Romania. The USAAS received three D.XIs with the PW-7 designation and Curtiss D-12 engines. 68580 had standard plywood wing skinning and V-type struts, but 68581 and 68582 had fabric wing skinning and N-type struts. Note bombs and McCook Field code P-327 on rudder. Photo from: San Diego Air & Space Museum