Most of tropical Africa did not have a cavalry. Horses would be wiped out by tse-tse fly. The zebra was never domesticated. The army of tropical Africa consisted of mainly infantry.
Technology
Griots are repositories of African history, especially in African societies with no written language. Griots can recite genealogies going back centuries. They recite epics that reveal
In 1987 the third oldest canoe in the world and the oldest in Africa, the Dufuna canoe, was discovered in Nigeria by Fulani herdsmen near the Yobe river