Slavery in Angola within the first six months of 1961. The Portuguese Army and Air Force put down the uprising and blacked out the incident to the press. The People's Movement for the Liberation of Angola (MPLA) said the Portuguese military killed ten thousand people in the massacre. Conservative estimates are around 400 casualties. These events are considered the beginning of the Portuguese Colonial War (1961-1974). After the April 1974 Carnation Revolution in Lisbon, Angola was offered independence from Portugal. After independence in 1975, during the Angolan Civil War (1975-2002), both the largest opposition group, National Union for the Total Independence of Angola
1970s in Angola governments of Angola, Zambia, and Zaire signed a non-aggression pact. 1970s in Angola The 1970s in Angola, a time of political and military turbulence, saw the end of Angola's War of Independence (1961–1975) and the outbreak of civil war (1975–2002). Agostinho Neto, the leader of the People's Movement for the Liberation of Angola (MPLA), declared the independence of the People's Republic of Angola on November 11, 1975, in accordance with the Alvor Accords. UNITA and the FNLA also declared Angolan independence as the Social Democratic Republic of Angola based in Huambo and the Democratic Republic of Angola based in Ambriz.