The date range for the Kush tribe was 3500 to 2000 BC their location was near the Nubia Nile river. They adapted by planting crops near the Nile . They also used the Cataracts as a wall to defend against attackers . The cataracts were natural barriers.
They also conquered Egypt. and had iron works
Iron for sale
Mali was a tribe in 1000 1500 they started on the upper Niger river they introduced cotton . and a really cool thing they did was when they also had many farmlands
Ghana was on the Niger river they had many salt mines they worked with iron and made iron tools.