Sep 1918–?? 1919Influenza pandemicstrikes South America
Nov 1918Germany signsarmistice with Allies,ending World War I
Nov 1920Mexican Revolution ends
Apr 1921Columbia recognizesPanama’s independence
Jun 1921–Feb 1922Abortive CentralAmerican Federation
Jan 1922Brazil reserves sitefor future capital
24 Mar 1922Salomón–Lozano Treatydefines Colombia-Peru border,giving Leticia to Colombia