World War 2 Timeline By rwhaney Sep 1, 1939 Begins Germany invades Poland May 10, 1940 Winston Churchill Churchill is appointed Prime Minister Period: May 26, 1940 to Jun 4, 1940 Dunkirk British army evacuates Dunkirk and survives to continue fighting. Jun 7, 1941 United States enter the war Japan attacks Pearl Harbor. Hitler declares war on the United States.
Germany invades Poland
Churchill is appointed Prime Minister
Japan attacks Pearl Harbor. Hitler declares war on the United States.