“A Squadron (Escadrille) of aircraft flown by the US aviators took part in the Polish-Soviet War. Merian Caldwell Cooper, who was a great grandson of John Cooper, the friend of Kazimierz Pułaski, made a promise to himself: America will reciprocate the Polish effort undertaken in the struggle for the US independence. Cooper was the person who paid the debt back. How did it happen?”
Youtube.com: American pilots during the Polish Soviet War in 1920