World War I By s-pasingh 1882 Forming of Triple Alliance 1894 Military alliance between France and Russia formed 1902 Japan became an ally of Britain 1907 Forming of Triple Entente Jun 28, 1914 Assassination of Francis Ferdinand Jul 28, 1914 Austria-Hungary declares war on Serbia Jul 29, 1914 Full mobilization of Russian troops Aug 1, 1914 Germany declares war on Russia Aug 3, 1914 Germany declares war on France Aug 4, 1914 World War I begins Aug 8, 1914 Defense of the Realm Act Sep 6, 1914 Battle of the Marne Feb 19, 1915 Battle of Gallipoli May 7, 1915 Sinking of the Lusitania Feb 21, 1916 Battle of Verdun May 31, 1916 Battle of Jutland Jul 1, 1916 Battle of the Somme 1917 Interception of the Zimmerman Note 1917 Germany resumes unrestricted submarine warfare Mar 8, 1917 The March Revolution Mar 15, 1917 Nicholas II abdicates his throne Apr 6, 1917 The US enter the war Nov 6, 1917 The Bolsheviks seize power 1918 The Influenza Epidemic Mar 3, 1918 Treaty of Brest-Litovsk Nov 9, 1918 German republic created Nov 11, 1918 German republic signs armistice 1919 Paris Peace Conference Jan 25, 1919 The League of Nations is accepted Jun 28, 1919 Treaty of Versailles