World War 1 Timeline By 11912454 Feb 4, 1914 Kaiser declares "open season" on ships Jun 28, 1914 Assassination of Franz Ferdinand Jun 28, 1914 Great War Begins May 7, 1915 Lusitania Sank Period: Jul 1, 1916 to Nov 18, 1916 Battle of the Somme Nov 7, 1916 Wilson re-elected Jan 1, 1917 Zimmerman note intercepted Apr 2, 1917 US declares War on Germany May 18, 1917 Selective Service Act Jun 15, 1917 Espionage Age Passed Nov 1, 1917 Russia Pulls Out of the War Jan 1, 1918 Flu Epidemic Jan 8, 1918 14 Points Speech May 16, 1918 Sedition Act Passed Aug 16, 1918 Convoy System Nov 11, 1918 Germany Signs Armistice
