The Union of South American Nations (USAN; Spanish: Unión de Naciones Suramericanas, UNASUR; Portuguese: União de Nações Sul-Americanas, UNASUL; Dutch: Unie van Zuid-Amerikaanse Naties, UZAN; and sometimes referred to as the South American Union) is an intergovernmental regional organization that once comprised twelve South American countries; as of 2019, most have withdrawn.