WW2 By stephan.t Sep 1, 1939 WW2 Start Polish invasion Sep 3, 1939 Prime minister Neville Chamberlain declares war on Germany Apr 9, 1940 Germany Invades Norway and Denmark May 10, 1940 Winston Churcill Becomes The New Prime Minister In The UK May 20, 1940 Aushwitch-Birkenau Established Period: 1941 to 1945 Holocaust Apr 30, 1945 Hitler Alt + F4´d himself May 11, 1945 USS Bunker Hill Attack Aug 6, 1945 Bombing of Nagasaki using the Fat Man Aug 6, 1945 Bombing of Hiroshima using the Little Boy Sep 2, 1945 WW2 Ends