WW2 By tsowers44 Jul 7, 1937 Japan invades China, initiating World War II in the Pacific. Period: Jul 7, 1937 to Sep 2, 1945 ww2 Apr 7, 1939 Fascist Italy invades and annexes Albania. Aug 29, 1939 Nazi Germany and the Soviet Union sign a nonaggression agreement Sep 1, 1939 Germany invades Poland, initiating World War II in Europe. Sep 17, 1939 The Soviet Union invades Poland from the east. Sep 29, 1939 The Polish government flees into exile via Romania. Germany and the Soviet Union divide Poland between them. Jun 10, 1940 Italy enters the war. Italy invades southern France Dec 7, 1941 Japan bombs Pearl Harbor. Dec 8, 1941 The United States declares war on Japan, entering World War II. Dec 8, 1941 The United States declares war on Japan, entering World War II. Dec 8, 1941 The United States declares war on Japan, entering World War II. Dec 11, 1941 Nazi Germany and its Axis partners declare war on the United States. Jun 1, 1942 British and US navies halt the Japanese naval advance in the central Pacific at Midway. Oct 9, 1942 US troops halt the Japanese island-hopping advance towards Australia at Guadalcanal in the Solomon Islands. May 13, 1943 Axis forces in Tunisia surrender to the Allies, ending the North African campaign. Jun 4, 1944 Allied troops liberate Rome. Jun 6, 1944 British and US troops successfully land on the Normandy beaches of France, opening a “Second Front” against the Germans. Jun 20, 1944 US troops land in the Philippines. May 8, 1945 Germany surrenders to the western Allies. Aug 9, 1945 The United States drops an atomic bomb on Nagasaki. Sep 2, 1945 Having agreed in principle to unconditional surrender on August 14, 1945, Japan formally surrenders, ending World War II.