It started in the North of the continent and has moved into Central Africa...but one question vexs me. Why haven't I seen military to military teaming with the nation of S. Africa? This would seem to be a no brainer to me, they have the most technologically advanced military on the continent (with Egypt being a close second), they're the most stable of all the African countries (including Egypt) and they're experienced when it comes to operations in the bush.
Putting the questions aside, when looking at S. African armor I am impressed. Take for example the Olifant Mk 2 Main Battle Tank.
The S. African's have taken a 1950's warhorse and made it capable of dealing with almost any threat in the region by itself and it becomes even more formidable when operating as part of a combined arms team. Military-Today.com has the best info and you can read more about it here.