November 11, 1918. World War I Ends. ... January 30, 1933. Hitler Appointed German Leader. ... September 1, 1939. World War II Begins. ... September 17, 1939. Soviet Union Invades Poland. ... September 27, 1939. Warsaw Captured. ... December 13, 1939. UK Wins War's First Sea Battle. ... April 8, 1940. ... May 10, 1940.
