Lateran Treaty
Negotiations for the settlement of the Roman Question began in 1926 between the government of Italy and the Holy See, and culminated in the agreements of the Lateran Pacts, signed—the Treaty says—for King Victor Emmanuel III of Italy by Benito Mussolini, Prime Minister and Head of Government, and for Pope Pius XI by Pietro Gasparri, Cardinal Secretary of State, on 11 February 1929. It was ratified on 7 June 1929. The agreements were signed in the Lateran Palace, hence the name by which they are known.
Latin America–United States relations
In Latin America itself, the US defense treaty was the Inter-American Treaty of Reciprocal Assistance (aka Rio Treaty or TIAR) of 1947, known as the "hemispheric defense" treaty. It was the formalization of the Act of Chapultepec, adopted at the Inter-American Conference on the Problems of War and Peace in 1945 in Mexico City. The U.S. had maintained a hemispheric defense policy under the Monroe Doctrine and, during the 1930s, had been alarmed by Axis overtures toward military cooperation with Latin American governments, in particular apparent strategic threats against the Panama Canal. During the war, Washington had been able to secure Allied support from all individual governments except Uruguay, which remained neutral, and wished to make those commitments permanent. With the exceptions of Trinidad and Tobago (1967), Belize (1981) and the Bahamas (1982), no countries that became independent after 1947 have joined the treaty.