ATAC Hawker Hunter air combat training exercise. see >1359245 (planefagging 101)
Please spend some time visiting PF 101.
Not got anything showing up military wise. Most of the people will be leaving by regular scheduled airline flights or crossing by land border into US.
We don't normally monitor the normal civvy stuff it is like trying to find a needle in a haystack.
SA government may well arrange charter of some holiday charter flights if needs be.