Chaco Peace Conference

…treaty was arranged by the Chaco Peace Conference, which included Argentina, Brazil, Chile, Peru, Uruguay, and the United States. It was signed in Buenos Aires on July 21, 1938. Paraguay gained clear title to most of the disputed region, but Bolivia was given a corridor to the Paraguay River and…

…organized and presided over the international mediation committee (Brazil, Chile, Peru, Uruguay, and the United States) that secured an armistice (June 12, 1935) in the Chaco War. Subsequently he was prominent in negotiations resulting in a permanent peace agreement (July 21, 1938).