High Quality Content by WIKIPEDIA articles! Angola-South Africa relations refer to the current and historical relationship between Angola and South Africa. Relations in the post-apartheid era are quite strong as the ruling parties in both states, the African National Congress in South Africa and the MPLA in Angola, fought together during the Angolan Civil War and South African Border War. They fought against UNITA rebels, based in Angola, and the apartheid-era government in South Africa which supported them. Nelson Mandela mediated between the MPLA and UNITA during the final years of the Angolan Civil War.