The Brazilian government did not accept the blockade tax for the germanic government and affirmed that Germany would be responsible if something with citizens, Brazilian merchandises or ships in acts occurred that involved the two countries. But only that in 3 of April of 1917, without advance warning and aid the victims, as had been informed, a German submarine torpedeou the Brazilian vapor Paran in the coast of France. The action of Brazil in ralao to this incident was only until the disruption of the diplomatical and commercial relations with the German Empire, in note signed for the Minister of the foreign affairs Lauro Muller in 11 of April of 1917. But the disruption of the diplomatical and commercial relations had not been the sufficient to satisfy the will of the population, and with this the Minister was in a delicate position, therefore at that moment the neutrality was going against the will of national. Had to this great pressure coming of them parliamentarians and journalists the minister resigned to the position in 3 of May of 1917.

After that who assumes the rank is the former vice-president Nile Peanha, who if simpatizava with the aliadfilos, and which had its inclinations, Brazil starts to change its position before the 12 conflict. BUENO continues its exposition saying that in 20 of May of 1917 the Brazilian vapor Tijuca was torpedeado by a German submarine, and two days later another Brazilian boat was torpedeada, the Lapa vapor. Ahead of the occurrence the government freed to circulate the nations friends informing that its neutrality in the conflict between United States and Germany was revoked. With the revocation of its neutrality, Brazil starts to receive in its ports boats from war from the countries 13 allies. HART 14 still complements that the drop d' water for Brazil was in 18 of October of 1917 when the merchant vapor Macau also was torpedeado and its commander was imprisoned, ahead of this the Executive and the National Congress had recognized state of war initiated for the German Empire against Brazil in 26 of October.