https://en.wikipedia.org/wiki/Curtiss_P-6_Hawk The Curtiss P-6 Hawk was an American single-engine biplane fighter introduced into service in the late 1920s with the United States Army Air Corps and operated until the late 1930s prior to the outbreak of World War II. A fast and highly maneuverable...

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https://en.wikipedia.org/wiki/Douglas_B-18_Bolo The Douglas B-18 Bolo was an American medium bomber which served with the United States Army Air Corps and the Royal Canadian Air Force (as the Digby) during the late 1930s and early 1940s. The Bolo was built by the Douglas Aircraft Company, based on...

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