 Upon his return from the war , Porto Alegre resumed his political career . He became an active advocate for the abolition of slavery and a patron in the fields of literature and science . His death came on 18 July 1875 while again serving in Parliament . He was highly esteemed until the downfall of the monarchy in 1889 . Regarded as too closely associated with the fallen regime , Porto Alegre slipped into obscurity . His reputation was eventually rehabilitated to a certain degree by historians , some of whom consider him to be among Brazil 's greatest military figures . 
