The 1942 Rio de Janeiro Conference was a diplomatic meeting held between 21American nations (excluding Guyana and Suriname who were not independent at the time) from 15 to 28 January 1942, in Rio de Janeiro, Brazil,with the intention of discussing relations with the Axis Powers and economic deals. Prior to the conference, The Dominican Republic, Haiti, Cuba, Panama, Costa Rica, Nicaragua, Honduras, El Salvador, and Guatemala had all declared war on Nazi Germany, while Mexico, Columbia and Venezuela had severed relations.
The US Deputy to the Secretary of State Sumner Welles spearheaded the conference. The result was a recommendation of severing diplomatic and economic relations with the Axis Powers.
On the 28th of January, Brazil, Peru, Ecuador, Paraguay and Uruguay in the severing of diplomatic relations with Nazi Germany.
By February 10th 1942, 10 countries had declared war on Germany, 9 had served diplomatic relations, with 2 failing to live up to the agreement.