A diplomatic initiative launched by a January 1983 meeting on Contadora Island off the Pacific coast of Panama, by which the ""Core Four"" mediator countries of Mexico, Venezuela, Colombia, and Panama sought to prevent through negotiations a regional conflagration among the Central American states of Guatemala, El Salvador, Honduras, Nicaragua, and Costa Rica. In September 1984, the negotiating process produced a draft treaty, the Contadora Acta, which was judged acceptable by the government of Nicaragua but rejected by the other four Central American states concerned. The governments of Peru, Uruguay, Argentina, and Brazil formed the Contadora Support Group in 1985 in an effort to revitalize the faltering talks. The process was suspended unofficially in June 1986 when the Central American governments refused to sign a revised Acta. The Contadora process was effectively superseded by direct negotiations among the Central American states.