By 1940, the United States still hadn't entered the Second World War but many volunteer pilots, like Lieutenant Eddie 'Mac' MacDonald, ventured across the Atlantic to join up. These brave men and their formations were known as Eagle Squadrons. Following the events of Pearl Harbor, America was catapulted into battle. With some action already under his belt, Mac thought his experience was invaluable to fresh American squadrons—until he met Major Art Langley, a man with a low opinion of the Brits. Now Mac had to prove he was no limey puppet—he was an American Eagle.