Interactive World War I Timeline By Ahsikmika McGhee Jun 28, 1914 Assassination of Archduke Francis Ferdinand assassination of Archduke Francis Jul 23, 1914 Austria-Hungary gives Serbia a ultimatum Austria-Hungary gives Serbia a ultimatum Jul 24, 1914 Serbia appeals to Russia Serbia appeals to Russia Jul 25, 1914 Serbia rejects Austria-Hungary's ultimatum Serbia rejects Austria-Hungary's ultimatum Jul 28, 1914 Austria-Hungary declares war on Serbia. Austria-Hungary declares war on Serbia Aug 1, 1914 Germany Declares War on Russia Germany Declares War on Russia Aug 4, 1914 Britain declares war on Germany Britain declares war on Germany Aug 26, 1914 Battle of Tannenberg Battle of Tannenberg Sep 6, 1914 First Battle of Marne First Battle of Marne Feb 21, 1916 Battle of Verdun Battle of Verdun Jul 31, 1917 Battle of Passchendaele Battle of Passchendaele Nov 20, 1917 Battle of Cambrai Battle of Cambrai Nov 11, 1918 Armistice Day (Veteran's Day) Armistice Day (Veteran's Day) Jan 10, 1920 Treaty of Versailles Treaty of Versailles
