After a long travel in wagons, these products reached the Rio de la Plata notoriously Buoyed and frequently quite irregular, since heavy Spanish galleons that should arrive and/or leave authorized ports in Spanish America mentioned above were frequently victims of the raids by British and Dutch lighter boats driven by pirates and privateers. It was clear that this monopolistic system orchestrated by the Spanish Crown with the complicity of the merchants of Lima, as it was raised, was not intended to favour Buenos Aires merchants or consumers. Consequently, Buenos Aires, postponed by the Crown, it was forced to purchase products from overseas not through the official system of fleets and Galleons but through smuggling. The Spanish authorities were very receptive to the interests of the Peruvian traders, who invoked the closure of the port of Buenos Aires. As a reply to this Pact between the metropolis and merchants Peruvian authorities, Buenos Aires traders gave back to the monopoly system trading with Englishmen and their allies Portuguese in an illegal way.
In 1620 was established the dry customs in Cordoba to stop through levies on goods in transit products and money smuggling between Buenos Aires and the provinces of the Interior. For its part, the localities of the rioplatense subregion of the coastline, as current, Goya and even assumption remained mere Cairns of the Spanish authority, abandoned in the middle of a vast jungle. Was almost non-existent outside support for the defense of the region; in Paraguay, the militias had based their mounts and weapons. The boats that crossed the region were forced to sell in small convoys as only protection against attacks from the Indian canoes. These examples constitute conclusive proof of the lack of interest of the metropolis into the Rio de la Plata region.