was fundamental for its success. In the Naval Battle of Riachuelo (June 11, 1865), Francisco Manuel Barroso da Silva, appointed by him to command the divisions operating on the Paraná River, won the victory that changed the course of the war in favor of the Triple Alliance. Marques Lisboa commanded the military operation in the battle of Paso de Patria in a successful landing of troops of great scope and thus, with the naval support in the conquest of the fortifications of the Paraguay River, secured the allied advance. Career His career, taken by reference until this day, is considered excellent academic material to better understand nineteenth-century Brazil. Throughout his military life, countless facts border the mythical scope. Nevertheless, many authors emphasize in addition to his heroic deeds that, in spite of his proximity to the Emperor D. Pedro II, he never gained political positions, a common fashion by that time, acting exclusively in military aspect - which is a curious fact because he fought for the Imperial State in all internal and external military interventions. His awakening into sailor life occurred after a solo trip to Rio de Janeiro aboard a ship from his father's company, when he performed the role of pilot, assisting the captain in seacraft. By the time politics were intense, that gave the young man the chance to enlist as volunteer and begin his journey in the National Navy which took him to the highest rank of the naval hierarchy. Political changes began in the Kingdom of Brazil with the return of King João VI to Portugal, leaving his son, Regent Prince D. Pedro, on Brazilian territory to rule for the Portuguese crown. However, displeased with decisions taken by the Lisbon's Cortes, Pedro decided to disobey them, which contributed to the political separation by the Brazilian Independence proclamation, who became crowned as its Constitutional Emperor and Perpetual Defender, awarding the title of Dom Pedro I. As a volunteer boarding Niterói, Tamandaré took part in several naval battles along the coast of provincial Bahia, where he had his baptism by fire on May 4, 1823, when the Brazilian fleet collided with enemy gunships. Days after, he pursued the fleeing Portuguese, capsizing seventeen enemy ships and draging the imperial flag until almost Tagus River entrance boarding the Niterói. Returning from an important mission entrusted to Niterói, Marques Lisboa was enrolled in March 1824, at the Imperial Navy