1 Apr 1920Last US troopsleave Siberia
13 Apr 1920Obregon revoltsagainst Carranza
May 1920Carranza fleesMexico City
Nov 1920Obregon becomes president,ending Mexican Revolution
Apr 1921Colombia recognizesPanama’s independence
Jun 1921–Feb 1922Abortive CentralAmerican Federation
12 Nov 1921–6 Feb 1922Washington Naval Conferencelimits warship construction