World War One By chrishoke Dec 6, 1905 Schlieffen plan is devised Aug 31, 1907 Triple Entente created Jun 24, 1914 Archduke Franz Ferdinand mudered Jun 28, 1914 Central Powers alliance established Jun 28, 1914 Australia enters the war Jul 6, 1914 Austria-Hungary send the July Ultimatum to Serbia Jul 28, 1914 World War One begins Jul 30, 1914 Germany enters the war Jul 30, 1914 Russia enter the war Aug 1, 1914 Germany declare war on Russia Aug 4, 1914 Britain declares war on Germany Aug 12, 1914 Battle of Cer begins Sep 5, 1914 First battle of Marne begins Apr 25, 1915 Battle of Gallipoli begins May 7, 1915 RMS Lusitania is sunk by Germany Jan 9, 1916 Battle of Gallipoli ends Jul 1, 1916 Batttle of the Somme begins Nov 18, 1916 Battle of the Somme ends Apr 6, 1917 USA enters the war Nov 11, 1918 World War One ends Nov 11, 1918 Armistice with Germany takes effect
