The Boeing P-12, also known as the Boeing F4B, is an American fighter aircraft that was utilised by the United States Army Air Corps, the United States Marine Corps, and the United States Navy. It served as the primary fighter aircraft in American military service during the early 1930s and was also employed internationally. By the late 1930s, it was supplanted in active duty by more modern designs; however, it continued to be used for training purposes into the early 1940s. Numerous variants of this aircraft were developed.
