The Union of South American Nations (UNASUR), also known as Unión de Naciones Suramericanas by the spanish, União das Nações Sul-Americanas by the Portuguese and Unie van Zuid-Amerikaanse Naties by the Dutch, is an intergovernmental union modeled as the European Union that was launched formally in May 2008. The main aim of forming the union was to enhance political, economical, social and cultural integration among the South American countries. It would also make to promote environmental and infrastructural development. The idea of South American integration is at the root of the history of South America, is the thought of San Martin and Bolivar among others, the creation of Patria Grande.
The treaty that led to the formation of the Union of South American Nations was signed in 2005 in a summit held in Brasilia by member states of the South American community of Nations (SACN). This treaty was signed by twelve nations, and it replaced the South American Community of Nations (SACN) on May 23, 2008. These nations were Argentina, Brazil, Bolivia, Colombia, Chile, Guyana, Ecuador, Paraguay, Peru, Uruguay, Venezuela and Suriname.
Panama and Mexico hold observer status in the union. The treaty established goals for integration on related matters and established a general secretariat in Quito, Ecuador and a parliament in Cochabamba, Bolivia. Some of the focus points of the UNASUR were the following: strengthening policy dialogue among Member States to guarantee a space for consultation to reinforce South American integration and participation of UNASUR in the international arena.