With the expansion of Napoleo Bonaparte the Portuguese Cut already analyzed a possible one removed of its territory, seen its in such a way warlike fragility how much economic, being impossible to defray a war I exercise against it French. The alternative of escape for Brazil is clear leading in consideration of that, beyond being its richer colony Brazil possua considerable a maritime distance of the Europe, vast territory and an urban structure capable to accomodate the Cut. It had then two measures to be taken ahead of the danger offered to Portugal for the Frenchmen: to organize the Society of Cut (Dukes, Barons, Condes, Viscondes, etc.); to sign an agreement of escort with the British Navy. The British Navy possua a great warlike power, that intimidated the proper Napoleo Bonaparte. Before the order of Real Escort, England saw then the possibility of if ' ' associar' ' to the businesses of Brazil, therefore since Century XVII the English searched the supremacy economic.

Ahead of the facts, having been Portugal invaded for French troops, the Real Family if sees debtor to sign favorable contracts (for same itself) such as the delivery of the Portuguese Squadron to England; transference of the administration of the Island of the Wood that would be under safekeeping of the English beyond what England could commercialize freely with Brazil for the lesser tax of taxes of the market. Therefore in 1810, the English had demanded that D. Joo VI signed Treat to Commerce and the Navigation. This treating established new customs rules. The new valuation on foreign merchandises defined the English attempt to get commercial monopoly. Being, therefore thus divided the customs tariffs in way that are charged 15% on the value of the English product; 16% on products of Portuguese origin; other countries would pay 24% of customs taxes. Historians believe that the opening of the Brazilian ports meant the end of Pact-Colonial.