WW2 By kawoolsey Sep 1, 1939 Germany invades poland Period: Sep 1, 1939 to May 7, 1945 WW2 and pearl harbor May 28, 1940 Belgium surrenders to Germany Apr 10, 1941 The U.S. occupies Greenland. Dec 7, 1941 bombing of pearl harbor Dec 11, 1941 Germany and war December 11, 1941Germany and Italy declare war on the U.S. Jan 26, 1942 first U.S. troops arrive in Britain May 12, 1943 Axis forces in North Africa surrender. Feb 20, 1944 The Allies begin massive bombing campaign of Germany. May 7, 1945 End of war May 7, 1945 Germany surrenders unconditionally.