• Nazi invasion of Poland.

    Nazi invasion of Poland.
    The invasion began on 1 September 1939, one week after the signing of the Molotov–Ribbentrop Pact, and ended on 6 October 1939 with Germany and the Soviet Union dividing and annexing the whole of Poland.
  • Italy

    Italy, a member of the Axis (countries allied with Germany), joined the war on June 10, 1940
  • Germans invade the Soviet Union.

    Germans invade the Soviet Union.
    After securing the Balkan region by invading Yugoslavia and Greece on April 6, 1941, the Germans and their allies invaded the Soviet Union on June 22, 1941, in direct violation of the German-Soviet Pact.
  • Pearl Harobor.

    Pearl Harobor.
    Japanese bomb Pearl Harbor; hitler issues "Night and Fog" decree.
  • Gassing.

    Mass murder of Jews by gassing begins at Auschwitz extermination camp.
  • Vichy France

    Vichy France
    The failure of French armed forces to prevent Allied occupation of Morocco and Algeria triggered a German occupation of collaborationist Vichy France on November 11, 1942.
  • Conference.

    Roosevelt, Churchill, and Stalin meet at Tehran Conference.
  • U.S. troops.

    U.S. troops.
    On September 11, 1944, the first U.S. troops crossed into Germany, one month after Soviet troops crossed the eastern border. In mid-December the Germans launched an unsuccessful counterattack in Belgium and northern France, known as the Battle of the Bulge.
  • Germany troops.

    Germany troops.
    German troops continued to hold northern Italy until surrendering on May 2, 1945.
  • First atomic bomb dropped on Japan.

    First atomic bomb dropped on Japan.
    By executive order of President Harry S. Truman, the U.S. dropped the nuclear weapon "Little Boy" on the city of Hiroshima on Monday, August 6, 1945 followed by the detonation of "Fat Man" over Nagasaki on August 9.