The Polish Air Force at War: The Official History, Vol.1: 1939–1943

After being overrun during the early Blitzkrieg in September 1939, and later in France in 1940, the Polish Air Force - flying British and American made fighters and bombers out of England in their own units - made a tremendous contribution to the Allied air victory. The PAFs gallant, lonely fight in September 1939 inflicted the first losses on the mighty Luftwaffe and allowed Britain a nine month grace to strengthen her air defenses.