In 1859, he moved to Florence, but soon swept up in the patriotic events, he volunteered for the Genovese Carabiniere, and took part in the campaigns.
[2] Because he took part in the Risorgimento Rivalta was able to obtain commissions for memorials of many of its leaders including Garibaldi, Cavour, Ricasoli and Victor Emmanuel II.
Among his other works are the giocatore di trottola ; the marble group of Un bambino che scherza con una capra; and A wounded Zouave in ministered in the field by a Sister of Charity, while a bersagliere, launches himself with his bayonet towards the enemy (1861).
He sculpted one of the bas-reliefs at the base of the Monument to Cavour in Turin, displaying the funereal cortege transporting the body to the cemetery.
He completed a number of busts, and the equestrian statue of Vittorio Emanuele II for Livorno.