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.