The Brazilian participation in the conflict was humble, if compared the ratio that the war reached, even so it has cost very expensive the DNOG. Another aspect that counts as credit for Brazil is that the same it was the only South-american country to participate actively of the conflict. One proves of this, according to HART 16, was that the English government decided for a reason or purpose to promote the English legation in Brazil embassy, as good will form stops with Brazil, raising the level of friendship between the two countries. 4,3 Consequences in the economy and foreign commerce BUENO, with its privilege to the access of information, in on the basis of tell the reports to them of the Treasury department of 1915 and 1916 that with the war in the Europe, some countries had had problems with its international commercial transactions. In the case of Brazil it had a very great fall in the customs taxes, what it was not very good, therefore to have a comparison parameter this tax meant in 1915, 66% of pblic revenues. to get worse the situation, with the beginning of the conflict, the transactions that before were carried through with the German Empire and Austria-Ungria, that 19% of the commercial movements of 17 Brazil represented on average had had that to be ceased. To everything this if also adds the difficulty found in the naval movements because of the submarine conflict and of the German naval blockade and ' ' lists negras' ' , that they forbade the national ones of one definitive country made any type of I deal with people of enemy countries. However the Department of state together with the Company of Navigation Brazilian Lloyd, was making a work differentiated between 1915 and 1916 in what it mainly says respect logistic of transports of merchandises and the coffee, although the difficulties created for the conflicting parts the Brazilian Lloyd continued with its good performance in this branch.