Not knowing much about warcraft and strategy, I would say that defense is equal to an offense. Pretorius selected that venue because it could be defended. 

I was hoping there would a single printed argument against the generally accepted version of history, especially dealing with African pre-colonial history. That's such a heated topic these days and it's crucial to be informed by various sources.

My own take on colonization is that it is an inevitability, talking into account our nature. Few nations have not been colonized. Stands to reason that if Africa wasn't colonized it would colonized others itself (generally speaking instead of calling out specific ethnic groupings like the Zulus or the Ashanti)  and did to some extent. So it's not so much the colonization itself that is problematic, but how the colonisers behaved towards the colonized.

I realise this is not what this discussion is about, strictly speaking, but it inevitably leads towards it.