To contribute a little to this,
if you're intehrested in the SA Bush war in Nambia, do a search for 'bush war'. Also, you may have a look at
www.acig.org, they cover the air aspect of this conflict pretty well.
Also, I recently read about a terrible accident during a live-firing exercise in SA, when a swiss-made Oerlikon *** 35mm twin AA gun went berserk and turned around, firing off its entire ammo, killing many solfiers, more than ten as far as I remember. People with experience on this gun tell me it's kinda hard to imagine how this could have happened, as the gun has security systems to prevent this and such an accident, as they say, was preciously unheard of... well... poor SA---