The Fall of France focused a lot of minds. One thing to think about it from across thousands of miles away from the Wehrmacht. Quite another when the Wehrmacht and Luftwaffe are across a few miles of the English Channel. I think it is fair to say that only the hope of US intervention kept Britain in the war.Understand, NOBODY but the Germans wanted any part of a second world war. The first had been entirely sufficient. The Munich sellout was popular. Not just in Britain, it polled 80% in the US, too. Basically, no one in Britain thought that France would fall - and anyone who did, would have thought long and hard before agreeing to participate in the fight.
And during the night of Dec. 7. 1941, Winston Churchill slept well. Most in England slept better than they had in years that night.