WWII By ticklerr Period: Jan 1, 1931 to Dec 31, 1941 wwII Sep 18, 1931 Japan invades Manchuria Oct 14, 1933 Hitler withdraws Germany from the League of Nations exact date unkown only know year Aug 23, 1939 Germany and the Soviet Union sign the Nazi-Soviet Non-Aggression Pact Sep 1, 1939 Germany invades Poland, starting the World War II Sep 3, 1939 Britain and France declare war on Germany Sep 4, 1939 U-boat U-30 sinks the British liner SS Athenia with 1,418 people on board; most are saved Jun 10, 1940 Italy declares war on France and Great Britain Mar 19, 1941 United States declares war on Japan Dec 7, 1941 The Japanese launch a sneak attack on Pearl Harbor, Hawaii Dec 11, 1941 Germany and Italy declare war on the United States; then the United States declares war on Germany and Italy
