The Revolta da Armada was a rebel movement promoted by units of the Brazilian Navy against the dictatorial government of Floriano Peixoto, supposedly supported by the monarchist opposition to the recent installation of the republic. It was part of the Federalist Riograndense Revolution, led by the monarchist Gaspar da Silveira Martins, one of the last ministers of the Empire of Brazil, who was disaffected by Deodoro da Fonseca.