world war 1 By edward101 Apr 28, 1914 austria hungary declares war declarations of war Jun 28, 1914 Assassination of Archduke Ferdinand archduke Ferdinand Aug 1, 1914 Germany and Russia declare war (declarations of war)[http://www.historyplace.com/worldhistory/firstworldwar/index-1914.html] Aug 3, 1914 Germany and France declare war declarations of war Aug 4, 1914 World War I Begins significant events Period: Aug 26, 1914 to Aug 30, 1914 Battle of Tannenberg five battle Period: Feb 19, 1915 to Jan 9, 1916 Battle of Gallipoli five battle Period: Feb 21, 1916 to Dec 18, 1916 Battle of Verdun five battle Period: May 31, 1916 to Jun 1, 1916 Battle of Jutland five battle Period: Jul 1, 1916 to Nov 18, 1916 Battle of the Somme five battle Sep 15, 1916 First Tanks significant events Nov 11, 1916 Armistice Day Armistice Day Feb 1, 1917 Submarines Back significant events Jun 28, 1919 The Treaty of Versailles Treaty of Versailles