Parallel Historical Timelines: World History By facebooker_1087819812 Sep 1, 1939 Nazi Germany invades Poland Germany invading Poland is often used as the point that began WWII. Sep 3, 1939 Britain and France declare war on Germany Sep 10, 1939 Canada declares war on Germany Sep 17, 1939 The Soviet Union invades Poland from the east Sep 27, 1939 Poland surrenders to Germany Oct 30, 1939 The Soviet Union invades Finland Nov 14, 1939 The Soviet Union is expelled from the League of Nations Mar 19, 1940 British drop the first bombs on German soil Apr 9, 1940 Germany invades Denmark and Norway Jun 10, 1940 Italy enters the war Jun 21, 1940 Italy invades southern France Jun 22, 1940 France signs an armistice with Nazi Germany Jun 22, 1941 Germany invades the Soviet Union Jul 12, 1941 Germany attacks Moscow for the first time Dec 7, 1941 Pearl Harbor