Nitistas
Neto's Interior Minister, Nito Alves, had successfully put down Daniel Chipenda's Eastern Revolt and the Active Revolt during Angola's War of Independence. Factionalism within the MPLA became a major challenge to Neto's power by late 1975 and he gave Alves the task of once again clamping down on dissension. Alves shut down the Cabral and Henda Committees while expanding his influence within the MPLA through his control of the nation's newspapers and state-run television. Alves visited the Soviet Union in October 1976. When he returned, Neto began taking steps to neutralize the threat he saw in the Nitistas, followers of Alves. Neto called a plenum meeting of the Central Committee of the MPLA. Neto formally designated the party Marxist-Leninist, abolished the Interior Ministry and DOM, the official branch of the MPLA used by the Nitistas, and established a Commission of Enquiry. Neto used the commission, officially created to examine and report factionalism, to target the Nitistas, and ordered the commission to issue a report of its findings in March 1977. Alves and Chief of Staff José Van-Dunem, his political ally, began planning a coup d'état against dos Santos.
Alves represented the MPLA at the 25th Soviet Communist Party Congress in February 1977 and may have then obtained support for the coup from the Soviet Union. Alves and Van-Dunem planned to arrest Neto on May 21 before he arrived at a meeting of the Central Committee and before the commission released its report. The MPLA changed the meeting's location shortly before its scheduled start, throwing the plotters' plans into disarray, but Alves attended the meeting and faced the commission anyway. The commission released its report, accusing him of factionalism. Alves fought back, denouncing Neto for not aligning Angola with the Soviet Union. After twelve hours of debate, the party voted 26 to 6 to kick Alves and Van-Dunem out of power.
Ten armored cars with the FAPLA's 8th Brigade broke into São Paulo prison at 4 a.m. on May 27, killing the prison warden and freeing more than 150 supporters, including 11 who had been arrested only a few days before. The brigade took control of the radio station in Luanda at 7 a.m. and announced their coup, calling themselves the MPLA Action Committee. The brigade asked citizens to show their support for the coup by demonstrating in front of the presidential palace. The Nitistas captured Bula and Dangereaux, generals loyal to Neto, but Neto had moved his base of operations from the palace to the Ministry of Defence in fear of such an uprising. Cuban troops retook the palace at Neto's request and marched to the radio station. After an hour of fighting, the Cubans succeeded and proceeded to the barracks of the 8th brigade, recaptured by 1:30 p.m. While the Cuban force captured the palace and radio station, the Nitistas kidnapped seven leaders within the government and the military, shooting and killing six.
The government arrested tens of thousands of suspected Nitistas from May to November and tried them in secret courts overseen by Defense Minister Iko Carreira. Those who were found guilty, including Van-Dunem, Jacobo "Immortal Monster" Caetano, the head of the 8th Brigade, and political commissar Eduardo Evaristo, were then shot and buried in secret graves. The coup attempt had a lasting effect on Angola's foreign relations. Alves had opposed Neto's foreign policy of non-alignment, evolutionary socialism, and multiracialism, favoring stronger relations with the Soviet Union, which he wanted to grant military bases in Angola. While Cuban soldiers actively helped Neto put down the coup, Alves and Neto both believed the Soviet Union supported Neto's ouster. Raúl Castro sent an additional four thousand troops to prevent further dissension within the MPLA's ranks and met with Neto in August in a display of solidarity. In contrast, Neto's distrust in the Soviet leadership increased and relations with the USSR worsened. In December, the MPLA held is first party Congress and changed its name to the MPLA-PT. The Nitista coup took a toll on the MPLA's membership. In 1975, the MPLA boasted of 200,000 members. After the first party congress, that number decreased to 30,000.
Read more about this topic: 1970s In Angola