The BR become frustrated with the end of the revolutionary period, the beginning of the consolidation of democracy and the preparation of Portugal’s entry into the European Economic Community (EEC).
At the same time its political arm, the Partido Revolucionário do Proletariado (PRP), supported Otelo Saraiva de Carvalho for the presidency in 1976, and later being the founder and promoter of the Unitary Organization of Workers (OUT) in whose first Congress in April 1978 participated other political parties with close links with terrorist groups, such as: ETA (Spain), Autonomia Operaia (Italy), Polisario Front (Sahrawi Arab Democratic Republic); and the Popular Front for the Liberation of Oman.
[3] In 1978 the bomb attack of a freight train in Mauritania, which caused the death of eight soldiers opened a series of internal discussions and disputes inside the BR.
[7] Within the BR the issue of the use of lethal violence and killings was something that had always been on the table and over time some militants rebelled against the narratives of restraint that were defended mainly by Isabel do Carmo and Carlos Antunes.
[9][10] The BR ended up being extinguished in 1980, due to internal disputes and the imprisonment of several members, including the leaders, Carlos Antunes and Isabel do Carmo, arrested on charges of bank robberies and bombings.