MPLA in the context of "Portuguese Army"

The Angolan War of Independence (Portuguese: Guerra de Independência de Angola; 1961–1974), known as the Armed Struggle of National Liberation (Portuguese: Luta Armada de Libertação Nacional) in Angola, was a war of independence fought between the Angolan nationalist forces of the MPLA, UNITA and FNLA, and Portugal. It began as an uprising by Angolans against the Portuguese imposition of forced cultivation of only cotton as a commodity crop. As the resistance spread against colonial authorities, multiple factions developed that struggled for control of Portugal's overseas province of Angola. There were three nationalist movements and also a separatist movement.

The war ended when a peaceful coup in Lisbon in April 1974 overthrew Portugal's Estado Novo dictatorship. The new regime immediately stopped all military action in the African colonies, declaring its intention to grant them independence without delay.

The Angolan Civil War (Portuguese: Guerra Civil Angolana) was a civil war in Angola, beginning in 1975 and continuing, with interludes, until 2002. The war began immediately after Angola became independent from Portugal in November 1975. It was a power struggle between two former anti-colonial guerrilla movements, the communist People's Movement for the Liberation of Angola (MPLA) and the anti-communist National Union for the Total Independence of Angola (UNITA).

The MPLA and UNITA had different roots in Angolan society and mutually incompatible leaderships, despite their shared aim of ending colonial rule. A third movement, the National Front for the Liberation of Angola (FNLA), having fought the MPLA with UNITA during the Angolan War of Independence, played almost no role in the Civil War. Additionally, the Front for the Liberation of the Enclave of Cabinda (FLEC), an association of separatist militant groups, fought for the independence of the province of Cabinda from Angola. With the assistance of Cuban soldiers and Soviet support, the MPLA managed to win the initial phase of conventional fighting, oust the FNLA from Luanda, and become the de facto Angolan government. The FNLA disintegrated, but the U.S.- and South Africa-backed UNITA continued its irregular warfare against the MPLA government from its base in the east and south of the country.

The National Union for the Total Independence of Angola (Portuguese: União Nacional para a Independência Total de Angola, abbr. UNITA) is the second-largest political party in Angola. Founded in 1966, UNITA fought alongside the People's Movement for the Liberation of Angola (MPLA) and the National Liberation Front of Angola (FNLA) in the Angolan War for Independence (1961–1975) and then against the MPLA in the ensuing civil war (1975–2002). The war was one of the most prominent Cold War proxy wars, with UNITA receiving military aid initially from the People's Republic of China from 1966 until October 1975 and later from the United States and apartheid South Africa while the MPLA received material and technical support from the Soviet Union and its allies, especially Cuba.

Until 1996, UNITA was funded through Angolan diamond mines in both Lunda Norte and Lunda Sul along the Cuango River valley, especially the Catoca mine, which was Angola's only Kimberlite mine at that time. Valdemar Chindondo served as chief of staff in the government of UNITA, pro-Western rebels, during the Angolan Civil War (1975–2002). Jonas Savimbi, leader of UNITA, allegedly ordered Chindondo's assassination.