World War 1 By claytonmead Jun 28, 1914 Assassination of Archduke Franz Ferdiand of Austria Aug 1, 1914 Declarations of War begin Aug 4, 1914 United Kingdom declares war on Germany Apr 25, 1915 Battle of Gallipoli begins Aug 6, 1915 Battle of Lone Pine Feb 21, 1916 Battle of Verdun begins - longest battle of the war May 31, 1916 Battle of Jutland - major naval battle begins Jul 19, 1916 Battle of Fromelles Apr 6, 1917 USA declares war on Germany Nov 11, 1918 Germany signs the armistice - fighting ends Jun 28, 1919 signing of the Treaty of Versailles
