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
Angola Avante an author who studied in Huambo and is affiliated with both the country's Writer Union and Union of Artists and Composers. He is one of the best-selling writers in the capital city Luanda – according to an "informal survey" conducted in July 2003 – and writes about "everyday life" in the country using satire and irony. The song was officially designated as the country's national anthem in 1975, when the country gained independence on November 11 of that year. It is enshrined under Article 164 of the constitution of Angola. Its lyrics refer to several key events in the history