Deciding Factors of World War II

  • Denmark and Norway Invaded by Nazis

    Denmark and Norway Invaded by Nazis
    In the early morning of 9 April 1940 (Wesertag; "Weser Day"), Germany invaded Denmark and Norway, ostensibly as a preventive manoeuvre against a planned, and openly discussed, Franco-British occupation of Norway.
  • Winston Churchill

    Winston Churchill
    Sir Winston Leonard Spencer-Churchill, KG, OM, CH, TD, PC, DL, FRS, RA (30 November 1874 – 24 January 1965) was a British statesman who was the Prime Minister of the United Kingdom from 1940 to 1945 and again from 1951 to 1955. Churchill was also an officer in the British Army, a historian, a writer (as Winston S. Churchill), and an artist. He won the Nobel Prize in Literature, and was the first person to be made an honorary citizen of the United States.
  • Land Lease Act Signed (US)

    Land Lease Act Signed (US)
    President Roosevelt signed the Lend-Lease bill into law on 11 March 1941. It permitted him to "sell, transfer title to, exchange, lease, lend, or otherwise dispose of, to any such government [whose defense the President deems vital to the defense of the United States] any defense article."
  • Soviet Union Invaded by Germany

    Soviet Union Invaded by Germany
    Under the codename Operation "Barbarossa," Nazi Germany invaded the Soviet Union on June 22, 1941, in the largest German military operation of World War II.
  • Japan Bombs Pearl Harbor

    President Franklin Roosevelt called December 7, 1941, "a date which will live in infamy." On that day, Japanese planes attacked the United States Naval Base at Pearl Harbor, Hawaii Territory. The bombing killed more than 2,300 Americans. It completely destroyed the American battleship U.S.S.
  • Battle of Midway

    Battle of Midway
    Six months after the attack on Pearl Harbor, the United States defeated Japan in one of the most decisive naval battles of World War II. Thanks in part to major advances in code breaking, the United States was able to preempt and counter Japan’s planned ambush of its few remaining aircraft carriers, inflicting permanent damage on the Japanese Navy. An important turning point in the Pacific campaign, the victory allowed the United States and its allies to move into an offensive position.
  • Allies Invade Italy

    Allies Invade Italy
    Sep 3, 1943 - Sep 1944. With North Africa secured and Sicily—the stepping stone to Italy—conquered, the Allied forces launched their invasion of Italy on 3 September 1943. It began with British forces skipping across the Strait of Messina to Calabria.
  • Italy Surrenders

    Italy Surrenders
    On Oct. 13, 1943, one month after Italy surrendered to Allied forces, it declared war on Nazi Germany, its onetime Axis powers partner. Italy was led into the war by Benito Mussolini, the fascist prime minister who had formed an alliance with Nazi Germany in 1936.