1–6 Dec 1914Villa & Zapatatake Mexico City
28 Jan–10 Aug 1915Carranza defeatsVilla & Zapata
May 1915German submarinesinks Lusitania withAmerican losses,angering US andleading Germanyto stop unrestrictedsubmarine warfare
Jul 1915US occupiesHaiti
9 Mar 1916Pancho Villaraids New Mexico
14 Mar 1916–7 Feb 1917US Punitive Expeditionhunts for Pancho Villa