WWII Timeline By Jwadsworth48 Feb 13, 1938 Th German Arrmy Mobilizes The Germans mobilize for war. Thir destination, Czchoslovakia, Feb 13, 1939 The Nazis take Czech The Nazis take Czech Sep 1, 1939 Nazis invad Poland Sep 10, 1939 Canada declares war on Germany Sep 17, 1939 Soviets invade Poland Apr 9, 1940 Nazis invade Denmark and Norway May 28, 1940 Belgium surrenders to the Nazis Jun 3, 1940 Germans bomb Paris Apr 17, 1941 Yugoslavia surrenders to the Nazis Sep 3, 1941 First experimental use of gas chambers at Auschwitz Oct 16, 1941 Germans take Odessa Oct 24, 1941 Germany takes Kharkov Dec 7, 1941 Pearl Harbor Japan bombed Pearl Harbor suddenly. Dec 8, 1941 Britain and th US declare war on apan Feb 13, 1942 Mass murder of Jews begins at Auschwitz Aug 17, 1942 First all-American air attack in Europe Sep 13, 1942 Battle of Stalingrad begins Feb 13, 1945 Iwo Jima Aug 1, 1945 Warning leaflets are dropped over 35 Japanesee cities Aug 5, 1945 Hiroshima Aug 9, 1945 Nagasaki