Hm..history questions like this are my weak point but i would probably say the reserve requirement?
The Population Registration Act determined people's race classification, which in turn determined the implementation of many other racially based laws. One of the apartheid laws passed in the 1950s was the Group Areas Act, which determined where people of different racial groups could live.
It looks as if he is replying back to them about a situation that got him confined during "constructive": work as he talk about himself and his work while asking or waiting for an answer back .
This is true. The British army was much larger and much more developed, but the colonial army managed to win by winning the support of the people and of foreigners. They were helped by British enemies such as France who was willing to give not only weapons and money, but also its navy and its generals with their war expertise.