José Anselmo dos Santos, known as Cabo Anselmo, is still today the best-known informant working for the Navy and the CIA during the Military Dictatorship. His speech on March 25, 1964, in which he came out in defense of the base reforms and the sailors' working conditions, culminated in the three-day occupation of the Palácio do Aço, headquarters of the Sindicato dos Metalúrgicos do Rio de Janeiro.
Around two thousand sailors were celebrating the second anniversary of the Brazilian Association of Sailors and Marines (Amfnb), of which Cabo Anselmo was president, when the Navy Minister, Sílvio Mota, ordered the arrest of the event's 40 organizers. Popular among the sailors, the association was not well regarded by the top brass, due to its reformist orientation and political nature. In reaction, the sailors refused to leave the union headquarters – on Ana Néri street, in São Cristóvão.
Mutinous sailors at Palácio do Aço receive soldiers from the dispatched troops, March 26, 1964. Correio da Manhã Collection/Arquivo Nacional.
Twenty-five soldiers from the troop sent by the minister to break up the protest decided to lay down their arms and join the mutiny. President João Goulart rushed back from São Borja to Rio de Janeiro, appointed a new minister to replace Sílvio Mota, and took over the negotiations. On the morning of the 27th, he arranged for the mutineers to withdraw, and in the afternoon he declared amnesty for the sailors.
Soldiers from the dispatched troops lay down their weapons and join the mutiny of the sailors, March 26, 1964. Correio da Manhã Collection/Arquivo Nacional.
The mutiny emerged victorious, and the Armed Forces were affronted. The sailors' revolt unified the barracks, weakened the government, and gave the leaders conspiring against Jango the pretext to uphold their claim of the president's illegality. Meanwhile, the horizon of the coup grew dangerously closer.
Marinheiros amotinados reagem à chegada dos soldados do Exército, 26 de março de 1964.
Fundo Última Hora/APESP.