Major Events of WWII By sowens097 Sep 18, 1931 Japan invades Manchuria. Nov 25, 1936 Nazi Germany and Imperial Japan sign the Anti-Comintern Pact, directed against the Soviet Union and the international Communist movement. Jul 7, 1937 Japan invades China. Mar 11, 1938 Germany incorporates Austria in the Anschluss. Aug 23, 1939 Nazi Germany and the Soviet Union sign a nonaggression agreement and a secret codicil dividing eastern Europe into spheres of influence. Sep 1, 1939 Germany invades Poland, initiating World War II in Europe. Sep 3, 1939 Honoring their guarantee of Poland’s borders, Great Britain and France declare war on Germany. Jun 10, 1940 Italy enters the war. Italy invades southern France on June 21. Sep 27, 1940 Germany, Italy, and Japan sign the Tripartite Pact. Dec 7, 1941 Japan bombs Pearl Harbor. Dec 8, 1941 The United States declares war on Japan, entering World War II. Apr 13, 1945 After a few years the United State and the allies make there way into germany leading to Hitler committing suicide. May 7, 1945 Germany surrenders to the western Allies. May 9, 1945 Germany surrenders to the western Allies. May 13, 1945 Allied troops conquer Okinawa, the last island stop before the Japanese islands. Aug 6, 1945 The United States drops an atomic bomb on Hiroshima. Sep 2, 1945 Having agreed in principle to unconditional surrender on August 14, 1945, Japan formally surrenders, ending World War II.