Introduction to Europe's History By pandaswag Sep 1, 1939 Germany invades Poland World War II begins. May 10, 1940 Churchill becomes Prime Minister of Britain Dec 7, 1941 Japan attacks Pearl Harbor and the US enters the war Sep 8, 1943 Italy surrenders but Germany takes over the war. Jun 6, 1944 D Day: The Allied invasion of France Aug 6, 1945 Atomic bombs are dropped on Nagasaki and Hiroshima