WWII Timeline By clawilson Sep 18, 1931 Manchuria is Invaded by Japan Manchuria is Northeast China. Jan 30, 1933 Hitler Becomes Chancellor Oct 3, 1935 Ethiopia is Invaded by Mussolini Jul 7, 1937 China Defeated by Japan Sep 29, 1938 Munich Agreement Mar 15, 1939 Slovak Republic is Formed Sep 1, 1939 Germany Invades Poland Sep 3, 1939 War is Declared on Germany Sep 17, 1939 Soviet Union Invades Poland Jun 10, 1940 Italy Enters WWII Sep 27, 1940 Germany, Japan, and Italy Sign Tripartite Pact Mar 1, 1941 Bulgaria Joins Axis Powers Jun 15, 1941 Croatia Joins Axis Powers Dec 7, 1941 Japanese Planes Attack Pearl Harbor Dec 8, 1941 The United States Enters WWII Jul 25, 1943 Fascist Grand Council Disposes Mussolini Jun 6, 1944 Operation Overlord, or D-Day, takes place May 8, 1945 Nazi Germany Surrenders Aug 6, 1945 Atomic Bomb is Dropped on Japan Sep 2, 1945 Japan Surrenders
