What policy was the United States pursuing in relation to the countries of Latin America?

The countries of Latin America are located mainly between the United States and Antarctica. At first, the Northerners fought with the Southerners to establish a republican form of government. They opposed the plantation tendencies of the southern territories, so deep conflicts ripened between them, which led to the Civil War. We managed to get rid of the plantation households. After the war between the continents, the establishment of the republic and the formation of states took place. In the south, Latin America was formed.