Significant Events in World War II By Meaghan Sep 1, 1939 Germany Invaded Poland Sep 3, 1939 Britain and France Declared War on Germany Period: Jul 1, 1940 to Dec 1, 1940 Battle of Britain Sep 1, 1940 Japanese Occupy Indo-China Bases Dec 9, 1941 War was declared on Japan Feb 15, 1942 Singapore Surrendered Nov 2, 1942 Recapture of Kokoda by Australians Sep 8, 1943 Italy surrenders to the Allies Period: Jan 1, 1944 to Mar 1, 1944 Bombing on German Cities Jun 6, 1944 D-Day Invasion May 7, 1945 Germany Surrendered Aug 6, 1945 Bombed dropped on Hiroshima Sep 2, 1945 Japan Surrendered