Operation Savannah was the South African code name for their military incursion into Angola in 1975–1976. It was part of the South African Border War and arose due to the Angolan War of Independence. The operation also materially influenced the subsequent Angolan Civil War. South African forces invaded deep into Angola with the objective of driving the MPLA, Soviet and Cuban forces out of southern Angola so as to strengthen the position of UNITA, the main opponent of the MPLA and an ally of South Africa.
South Africa as well as UNITA and FNLA had been receiving material and tacit support of the United States as part of their Cold War opposition to the Soviet Union which emboldened them to pursue this incursion. South African and UNITA fortunes were overturned and their forces were compelled to withdraw due to MPLA, Cuban and Soviet pressure. Victory was claimed by the MPLA who were actively supported by Cuba and the Soviet Union, over the combined forces of UNITA, FNLA, Zaire and South Africa. For the MPLA, the victory was essential for the proclamation of independence and subsequent political control over Angola.