World War II By Marta11 Sep 1, 1939 Germany's invasion of Poland Sep 3, 1939 Declaration of war on Germany Period: Jul 1, 1940 to Dec 1, 1940 Battle of Britain Sep 1, 1940 Jpanes start occupying Indo-China Dec 9, 1941 Declaration of on Japan Jan 15, 1942 Surrender of Singapore Nov 2, 1942 Australian forces re-capture Kokoda in Papua-New Guinea Sep 8, 1943 Surrender of Italy to the Allies Period: Jan 1, 1944 to Mar 1, 1944 Bombing of German cities Jun 6, 1944 D-Day Invasion of Europe May 7, 1945 Surrender of Germany Aug 6, 1945 Atomic bomb dropped in Hiroshima Sep 2, 1945 Surrender of Japan