World War 1 By 11913027 Jun 28, 1914 Assassination of Franz Ferdinand Jul 28, 1914 Great War Begins Feb 4, 1915 Kaiser Declares "Open Season" on Ships May 7, 1915 Lusitania Sank Period: Jul 1, 1916 to Nov 18, 1916 Battle of the Somme Nov 7, 1916 Wilson Re-Elected Jan 11, 1917 Zimmerman Note Intercepted Apr 6, 1917 US Declares War on Germany May 18, 1917 Selective Service Act May 24, 1917 Convoy System Jun 15, 1917 Espionage Age Passed Period: Nov 6, 1917 to Nov 7, 1917 Russia Pulls Out of the War Jan 8, 1918 Fourteen Points Speech Period: Mar 1, 1918 to Oct 1, 1919 Flu Epidemic May 16, 1918 Sedition Act Passed May 16, 1918 Sedition Act Passed Nov 11, 1918 Germany Signs Armistice
