1914 to 1980 By facebooker_1356090467912583 Jun 28, 1914 1914 France, Russia, and the United Kingdom declare war on Germany and Austria-Hungary at the start of the World War. Feb 5, 1917 Mexican Constitution Sep 25, 1917 Russian Civil War Oct 11, 1918 WWI ends 1929 Great Depression Aug 1, 1939 WWII 1940 Great depression ends Period: 1940 to 1979 Mexican MIracle 1941 Japan attack Pearl Harbor 1945 WWII ends 1955 Disneyland opens in Los Angeles. Nov 1, 1955 War of Viethnam 1965 USA send the first troops to Vietnam. 1969 American astronauts Armstrong and Aldrin step on the moon. 1973 Picasso dies in France. 1975 Viethnam war ends 1977 First democratic elections in Spain. 1980 The Iran-Iraq war intensifies.