Game over for the Luftwaffe
September 15, 1940 - The Battle of Britain reaches its climax when the Royal Air Force (RAF) downs 56 invading German aircraft in two dogfights lasting less than an hour. The costly raid convinced the German high command that the Luftwaffe could not achieve air supremacy over Britain, and the next day daylight attacks were replaced with nighttime sorties as a concession of defeat. On September 19, Hitler postponed indefinitely “Operation Sea Lion”–the amphibious invasion of Britain. Although heavy German aid raids on London and other British cities would continue through spring 1941, the Battle of Britain was effectively won.