World War II By alexschutter Sep 1, 1939 Hitler invades Poland Sep 3, 1939 Britain and France Declare War on Germany May 10, 1940 Hitler Launches Blitzkrieg May 13, 1940 Neville Chamberlain Resigns; Winston Churchill Becomes Prime Minister May 26, 1940 Dunkirk Jun 11, 1940 Italy Enters War Sep 22, 1940 Tripartite Pact between Germany, Italy, and Japan Jun 22, 1941 Operation Barbarossa - Hitler Attacks Russia Dec 7, 1941 Pearl Harbor Dec 8, 1941 Britain and US Declare War on Japan Jun 16, 1942 Battle of Midway Nov 15, 1942 Battle of Stalingrad Sep 3, 1943 Italy Surrenders Jun 6, 1944 D-Day Aug 25, 1944 Paris Liberated Dec 15, 1944 Battle of the Bulge Apr 12, 1945 Death of President Roosevelt Apr 28, 1945 Mussolini Captured and Executed Apr 30, 1945 Hitler Commits Suicide May 4, 1945 Germany Surrenders Aug 6, 1945 Atomic Bomb Dropped on Hiroshima Aug 8, 1945 Russia Declares War on Japan Aug 9, 1945 Atomic Bomb Dropped on Nagasaki Aug 14, 1945 Japan Surrenders