Here's an idea:
The Draka, or someone like them, get established in Africa, but since this is a more realistic TL, they don't spread very far.
Then they collapse due to a combination of falling behind technologically/economically, military defeat, and/or general serf revolt.
Imagine Rwanda, only with many ethnicities and everybody better-armed, all across a significant chunk of Africa.
The Draka, or someone like them, get established in Africa, but since this is a more realistic TL, they don't spread very far.
Then they collapse due to a combination of falling behind technologically/economically, military defeat, and/or general serf revolt.
Imagine Rwanda, only with many ethnicities and everybody better-armed, all across a significant chunk of Africa.