World War 1 Timeline By 12175627 Feb 4, 1914 Kaiser declares "open season" on ships Jun 28, 1914 Assassination of Franz Ferdinand Jul 28, 1914 Great War Begins May 7, 1915 Lusitania Sank Jul 1, 1916 Battle of the Somme Nov 7, 1916 Wilson re-elected Jan 1, 1917 Zimmerman note intercepted Apr 2, 1917 U.S. declares war on Germany Jun 15, 1917 Espionage Act Passed Nov 1, 1917 Russia pulls out of the War Jan 1, 1918 Flu Epidemic 1918 Selective Service Act Jan 8, 1918 Fourteen Points Speech May 16, 1918 Sedition Act Passed Aug 16, 1918 Convey System Nov 11, 1918 Germany signs Armistice
