world war By ilyaas aden Jun 28, 1914 Archduke Ferdinand of Austria-Hungria and his wife are assassinated by Serbians Jul 28, 1914 Austria-Hungary declares war on Serbia Jul 30, 1914 Russia Mobilizes Aug 1, 1914 Germany declares war on Russia Aug 3, 1914 Germany declares war on France Aug 4, 1914 Britian declares war on Germany Aug 6, 1914 austria-hungary declares war on Russia Aug 12, 1914 France and Britian declare war on Austria Hungary Apr 4, 1917 U.S declares war on Germany Nov 11, 1918 Armitce signed Jun 28, 1919 Treaty of Versailles