South Africa

South Africa was a nation in southern Africa.

Old timeline
In the unaltered timeline in which WOTAN briefly conquered Earth, the apartheid government collapsed and South Africa became a united, multicultural nation by the end of the 1960s. During World War III, it made a deal with the Cybermen to augment its weaponry and waged war in Europe to liberate the continent, finally taking the United Kingdom in 2006. The First Doctor averted this timeline, first by preventing WWIII in 1972, (PROSE: The Time Travellers) and later by defeating both WOTAN and the Cybermen, creating a new timeline in which a collapse of civilisation and WWIII never happened. (TV: The War Machines, The Tenth Planet)

New timeline
During the 22nd century Dalek occupation, a South African resistance group existed. Contact was lost with them in 2167 and they were presumed exterminated. (TV: The Dalek Invasion of Earth)

Dr Miles Mason worked in South Africa for eight years prior to being hired by Carrington Corp in 3999. (PROSE: Placebo Effect)

In the year 5000, (TV: The Talons of Weng-Chiang) South Africa was home to one of the five ioniser bases keeping back the glaciers of the second Ice Age. (TV: The Ice Warriors)

The Year That Never Was
During the Year That Never Was, one of the Toclafane was struck down by lightning in South Africa, deactivating it by chance. Martha Jones, Thomas Milligan, and Alison Docherty replicated those conditions to bring down a Toclafane. They soon realised the Toclafane were humans from the end of the universe, who had shared memories. This was suggested by by the one brought down quoting young Creet on Malcassairo. (TV: Last of the Time Lords)