World War II - Key Events JJjj By jjewett Sep 1, 1939 Hitler invades Poland Sep 3, 1939 Britain & France declare war on Germany Dec 7, 1941 Pearl Harbor Attacked A date that will live in infamy... Jun 6, 1944 D-Day test edit Sep 2, 1945 Formal Surrender of Japan Emperor Hirohito and General Douglas MacArthur sign surrender agreement on the deck of the USS Missouri which was docked in Tokyo Bay.
