Katie Norton By knorton17 Jun 1, 1914 Assassination of Franz Ferdinand Gabrielle Princip killed both Franz and his wife. Period: Jun 1, 1914 to Jul 1, 1917 World War I Jul 1, 1914 Austria-Hungary Jul 1, 1914 Serbia Aug 1, 1914 Great Britain Aug 1, 1914 Belguim Aug 1, 1914 France Aug 1, 1914 Russia Aug 1, 1914 Germany Oct 1, 1914 Ottoman Empire May 1, 1915 Italy Oct 1, 1915 Bulgaria Mar 1, 1916 Portugal Apr 1, 1916 Romania Jul 1, 1917 Greece