world war 2 By Ms Mullen Sep 1, 1939 Germany invades Poland. Britian and France give Hitler an utlimatum Period: Sep 1, 1939 to Sep 2, 1945 world war 2 Sep 3, 1939 Britian and France delcare war against Germany. Dec 17, 1939 disable German pocket battleship Admirel Graf Spee blown up of Montevideo, Uruguay, on Hitlers orders. May 10, 1940 Nazis invade Neverlands, Belgium, and Luxesmbourg.