What we think of as the Battle of Britain resolved nothing, though it did lodge the RAF and its fighter pilots forever in the pantheon of British heroes. The Blitz followed soon afterward, with the first deliberate German raid on London, on Sept. 7, 1940, which was followed by another 56 consecutive nights of raids against the city. The British endured this phase, but even then the raids did not end. Winter weather forced interruptions, but the raids that did occur were even more severe, with possibly the worst of the war taking place on May 10, 1941. Over the winter the risk of invasion waned, because of weather, but with the advent of spring, the threat once again seemed grave—though intelligence began detecting a shift in Hitler’s attention toward the East. It was that shift, and Churchill’s staunch defiance, that ultimately ended the invasion threat, and caused the Luftwaffe to suspend its raids against London.