Based on

Movies like International Squadron (1941)

The true story of the exploits of the RAF's (Royal Air Force) foreign legion battling the German Luftwaffe (Nazi Germany's Air Force) during the early months of 1941 during WWII before America officially entered the war at the end of the year when Pearl Harbor was attacked by Japan and Hitler declared war on the United States. The United States then drafted all of their airmen and fighter pilot aces into the United States Air Force for their own combat missions against the Luftwaffe