World War I (The Great War By te5923 Jun 28, 1914 Asssassination of Francis Ferdinand Francis will shoot and killed when him and his wife had just gotton mairred. Period: Jun 28, 1914 to Mar 21, 1918 World War I This the the time span of the world war I Jul 28, 1914 Austria declared War on serbia The said it's war time. Aug 1, 1914 Germany declared War Russia Germany started the war Aug 4, 1914 Germany Declared War Russia May 23, 1915 Italy Declared War On Germany