Alternate History Events By 24guppra Period: 1400 to 1960 European Colonization European Colonization of other parts of the world. Apr 19, 1775 American Revolutionary War Ended on September 3, 1783 Apr 12, 1861 American Civil War Ended on May 9, 1865 Sep 1, 1939 World War 2 Ended on September 2, 1945