On Winston Churchill's first day as prime minister, Hitler invaded Holland and Belgium. Poland and Czechoslovakia had already fallen, and the Dunkirk evacuation was just two weeks away. For the next twelve months, Hitler would wage a relentless bombing campaign, killing 45,000 Britons (30,000 of them Londoners) and destroying two million homes. It was up to Churchill to hold the country together and persuade President Franklin Roosevelt that Britain was a worthy ally–that she was willing to fight to the end.