The conflict itself is an interesting study. Belgium vs the UN, Katanga vs the Congo, Soviets vs U.S., mercenaries, CIA, KGB even Che Guevara getting thrown into the mix.
I bumped this up because I was thinking today of what Hoare was able to accomplish given the fact that he was basically recruiting mercenaries off the streets of South Africa and elsewhere and many, if not most, had no military experience whatsoever. He had his core cadre of former military professionals and combat vets, but a lot of the men who came to the Congo were raw, just looking for adventure.