U.S. History 2 By masongrillo Jun 28, 1914 Archduke Franz ferdinand was assassinated Jul 28, 1914 Austia-Hungary declares war on serbia Aug 1, 1914 Germany declared war on Russia Aug 3, 1914 Germany declares war on France Aug 4, 1914 The United Kingdom declares war on germany Aug 6, 1914 Austria-Hungary declares war on russia and serbia declares war on Germany Aug 26, 1914 Battle of Tannenberg begins May 7, 1915 lusitania is sunk by a german U-boat Feb 21, 1916 Battle of Verdun begins Jul 1, 1916 Battle of somme begins Jan 19, 1917 Germany sends the secret Zimmerman telegram to mexico while british intelegence intercept it Apr 6, 1917 America declares war on germany Nov 7, 1917 Bolsheviks succesfuly overthrow the russian government Dec 17, 1917 the armistice agreed upon between the russian government and the central powers Jan 8, 1918 woodrow wilson issues his 14 point plan Nov 11, 1918 Germany signs the armistice Jun 28, 1919 The treaty of Versailles oficially ends world war 1