What was instituted by President Franklin Roosevelt and is credited with most of the nations in Latin America giving unified support to the allies during World War 2?

President Franklin Roosevelt instituted the "Good Neighbor Policy," which aimed to improve relations with Latin American countries by promoting mutual respect and economic cooperation. This policy fostered a sense of solidarity and partnership, leading many Latin American nations to support the Allies during World War II. The emphasis on non-intervention and collaboration helped to unify the region's stance against Axis powers. As a result, several Latin American countries contributed troops and resources to the Allied war effort.