Cuban intervention in Angola the requested financial assistance (100,000US$) it received from Yugoslavia. Portugal's sudden retreat from Angola and Mozambique in 1975 ended a history of South African military and intelligence cooperation with Portugal against the Angolan and Namibian independence movements dating back to the 1960s, later formalized in a secret alliance codenamed Alcora Exercise. It also ended economic cooperation with regard to the Cunene hydro-project at the Angolan-Namibian border, which South Africa had financed. South African involvement in Angola, subsumed under what it called the South African Border War, started in 1966 when the conflict with the Namibian independence movement, South West Africa
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.