Well, you didn't tell very novel stuff. I was expecting a bit more specific look at the various nations.
BTW, Zulus actually used giraffe hide shields, IIRC.
Sorry if it wasn't very specific, just trying to help. I've got a weapons encyclopedia somewhere that'll have info about their weapons, but not too much info about their tactics or strategy.
---On Weaponry---
In West Africa they sometimes used fighting picks, with barbed metal points and a tang inserted into a wooden shaft. The roughened skin of monitor lizards was used as a grip. These weighed 0.65kg/ 1.5 lbs. They also used (especially in Dahomey, from what I can gather) used 'axe clubs' (yes, these look like clubs, but with a blunt metal blade jutting out of the club-head. These clubs weighed 0.39 kgs/ 0.75 lbs.
Sudanese often used arrows, which were barbed (weighed 1 oz/28g per arrow). They used to rush forward to discharge their arrows at approx. 50m (165ft) and would then retreat out of range of the enemy. The South Sudanese also used curved 'sickle knives', which weighed 0.55kgs.
In the Congo, axes were quite common for ceremonial practices (and I assume warfare too). The Songye people in SE Congo used axes, made out of iron and copper. The Kasai people used copper daggers that have possibly been influenced by Islamic styles.
in Uganda and surrounding areas they used 'finger knives' which were used both as weapons and as butcher's tools. They were used as claws (think a velociraptor's toe). They weighed 50grams.
Many parts of Africa used throwing knives, which seemed to function more similarly to throwing axes than the traditional Western throwing knives.
Hope this stuff is useful
(Btw, it WAS cow-hide shields)