World War 1 By NaliaJordan Jun 28, 1914 Assassination of the Archduke Ferdinand Archduke Ferdinand Jul 2, 1914 France France Jul 28, 1914 Austria-Hungary declares war on Serbia Austria-Hungary declares war on Serbia Apr 6, 1917 U.S. declares on Germany U.S. declares on Germany Oct 26, 1917 Brazil Brazil Dec 7, 1917 U.S declares War on Austria-Hungary U.S. declares War on Austria-Hungary May 23, 1918 Costa Rica CostaRice Nov 11, 1918 Armistice Day Armistice Day Jan 28, 1919 Treaty of Versailles Treaty of Versailles Period: Nov 1, 1955 to Apr 30, 1975 The Vietnam War The Vietnam War
