After independence from Portugal, civil war erupted between the Soviet/Cuban-backed MPLA and the U.S./South Africa-backed UNITA. Fueled by ideology, ethnicity, and oil wealth, the war killed hundreds of thousands and ended with the 2002 Luena Memorandum.
Post-independence, FRELIMO (Soviet/Cuban-backed) fought RENAMO (Rhodesia/South Africa-backed). Rooted in ideology, ethnic rivalry, and resources, the war caused massive displacement and ended with the 1992 General Peace Agreement, leading to multiparty democracy.