ABC countries

This article is about a transnational region in South America. For the region within Brazil, see ABC Region. For similarly named localities elsewhere, see ABC#Places.
Diplomats Eduardo Suárez Mujica of Chile, Domício da Gama of Brazil and Rómulo S. Naón of Argentina in the Niagara Falls peace conference in 1914

The ABC countries, or ABC powers, are the South American countries of Argentina, Brazil, and Chile, seen as the three most powerful, influential and wealthiest countries in South America. The term was mostly used in the first half of the 20th century, when the three countries worked together to develop common interests and a coordinated approach to issues in the region with relatively little influence from outside powers.