What group of people served in the African tribal assembly?

I've never heard of an African Tribal Assembly (named as such) . There are over 7,000 tribes across Africa and they all have different kinds gatherings and events you could call assemblies. Each would be according to their individual tribal customs.

I've never heard of an African Tribal Assembly . There are over 7,000 tribes across Africa and they all have different kinds gatherings and events you could call assemblies. Each would br according to their individual tribal customs.