Which was not a mistake that Hitler made during World War II which cost him the war

The Blitzkrieg of France. The battle of Britain was a slight blunder. The Luftwaffe failed. However, if they deprived Britain or sought peace the war would have ended differently. Hitler's "true" enemy was the communists.

were at first enthusiastic in support of the revolution. however, over time divisions of opinion became apparent between federalists and anti-federalists