Revolutionary Party of the Proletariat – Revolutionary Brigades (in Portuguese: Partido Revolucionário do Proletariado -Brigadas Revolucionárias) was a political party in Portugal. The Revolutionary Brigades were founded in 1970 by Isabel do Carmo, Carlos Antunes and Pedro Goulart, and advocated armed struggle against the regime. The first armed action was carried out in 1971. PRP-BR was constructed as a party later. After November 25, 1975, PRP and Revolutionary Brigades were formally separated. PRP-BR did not participate in elections after the advent of democracy in Portugal.