From where did africans first gain ideas about settled agriculture

Agriculture have been developed independently in Africa, but many of them believed that the spread of agriculture Africa is through Near East. Since the first domesticated crops were millets and sorghums whose origins are not Africa but West Asia. They began to develop their own crops, such as varieties of rice and they demonstrated and continued the same. At the same time, other crops, such as bananas, were introduced from Southeast Asia, and American crops such as maize and manioc, spread widely throughout Africa.

Militarism is the answer.