History of Paraguay its capital, and Río de la Plata, with headquarters in Buenos Aires. With this decision, Asunción lost control of the Río de la Plata estuary and became dependent on Buenos Aires for maritime shipping. In 1776, the crown created the Viceroyalty of Río de la Plata; Paraguay, which had been subordinate to Lima, now became a provincial outpost of Buenos Aires. Located at the periphery of the empire, Paraguay served as a buffer state. The Portuguese blocked Paraguayan territorial expansion in the north, native tribes blocked it – until their expulsion – in the south, and the Jesuits blocked it
Economy of Paraguay Most of Paraguay's trade takes place with Uruguay, Brazil and Argentina. In 2002 Paraguay conducted more than US$400 million in trade with Argentina and nearly US$800 million with Brazil. Paraguay is also a member of the Inter-American Development Bank, Latin American Integration Association, and Latin American Economic System and a signatory to the agreement creating the South American Community of Nations. In 2004 Paraguay signed an energy cooperation agreement with Venezuela to purchase oil and petroleum. Venezuela agreed to concessional financing that allowed Paraguay to pay over a 15-year period at a nominal interest rate. Imports totaled US$3.3 billion in