The Collapse of the Old Order WWII By facebooker_1383171276 Sep 1, 1939 German forces invade Poland Jun 21, 1941 German forces invade USSR Dec 7, 1941 Japanese aircraft bomb Pearl Harbor Jun 6, 1944 D-day: U.S., British, and Canadian troops land in Normandy May 7, 1945 Germany surrenders Aug 6, 1945 United States drops atomic bomb on Hiroshima Aug 14, 1945 Japan surrenders Oct 1, 1949 Communist defeat Guomindang; Mao proclaims People's Republic