History project By RPSurfer Jul 7, 1939 Japan Joins Japan Joined World War 2. Sep 1, 1939 The Start World War 2 started Period: Sep 1, 1939 to Sep 2, 1945 World War 2 When World War 2 started. Dec 7, 1941 America Joins America joins the war after the Japanese bombed Hawaii. The bombing is known as the Pearl Harbor Bombing. May 8, 1945 Thankful End Holocaust ended. Sep 2, 1945 The End World War 2 ends
