Very interesting--Never gave it much thought until now:

http://www.pan.net/history/enigma/enigma9.htm

Authors:
Andrzej Dabrowa, Ph.D.
Richard Lobodzinski, MsME


On the 11th of June 1940 the Polish Government in Exile signed an agreement with the British Government to form Polish Army in Britain and specifically Polish Air Force. First two (of ten) Polish fighter squadrons went into action in August 1940. Total of 89 Polish pilots defended the British sky. The squadron named after the Polish-American hero General Tadeusz Kosciuszko, achieved the highest number of kills (273) of all fighter squadrons in the Battle of Britain.


http://2ndww.tripod.com/England/britain.htm

On 30 August the first foreign fighter, Flight Officer Ludwik Paszkiewicz from the Polish Squadron 303 shot down his first German. This victory came somewhat incidentally - during a training flight. Dowding so far did not trust foreign pilots and their experience gained over the continent. Paszkiewicz's success had dismissed his prejudices. The next day he ordered to introduce foreign squadrons to fights.


http://egyptian.net/~leftypen/biggen.htm

Located just outside London, Biggen Hill now houses St. George's Chapel, which is dedicated to the memories of the pilots who fought in the Battle of Britain. Each stained glass window in the chapel has an image of a pilot representing every one of the squadrons that served with the Royal Air Force (RAF).

Since the United States did not enter the war until over two years after the invasion of Poland, a number of American pilots saw early action by flying with the RAF. The Biggen Hill Chapel lists no American pilots, however. Because of laws which prohibit Americans from fighting with foreign countries, those Americans who battled the Nazis before Pearl Harbor first went to Canada and then registered as Canadian citizens. There is no designation on the Biggen Hill wall to tell which of the Canadian pilots was actually an American.

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