World War II By kwerts468 Sep 1, 1939 Germany invades Poland; World War II begins Apr 9, 1940 Germany invades Norway and Denmark May 10, 1940 Attacks against Netherlands, Belgium, and France Jun 10, 1940 Italy enters World War II Jul 10, 1940 Germany Launches air attack on Great Britain Sep 22, 1940 Germany, Italy and Japan sign the Tripartite Pact creating the Axis Alliance Jun 22, 1941 Germany and the Axis Powers attack Russia Dec 7, 1941 Japanese attack the US Navy in Pearl Harbor. The US enters World War II Jun 4, 1942 US Navy defeats the Japanese Navy at the Battle of Midway Sep 3, 1943 Italy surrenders to the Allies; however Germany helps Mussolini to escape and set up a government in N. Italy Jun 6, 1944 D-Day and the Normandy invasion Aug 25, 1944 Paris is liberated from German control Feb 19, 1945 US Marines invade the island of Iwo Jima Apr 12, 1945 US President Roosevelt dies. He is succeeded by President Truman. Apr 30, 1945 Adolf Hitler commits suicide May 7, 1945 Germany surrenders to the Allies Aug 6, 1945 US drops atomic bomb on Hiroshim, Japan Aug 9, 1945 Atomic bomb is dropped on Nagasoki, Japan Sep 2, 1945 Japan surrenders to US General MacArthur and the Allies