"Millitary Technology in Afria: King Abubakari II was claimed to have had an armada of war ships in the 14th century. It is corroborated by ibn Battuta who saw several hundred himself. The ships communicated by drum. Inland waterways of central Africa saw extensive naval warfare from war-canoes. They did have sailing technology, but most were driven by oar. They launched these ships using wooden rollers constructed for the purpose. Some canoes were 80ft+ long and could carry 100+ men". Hope they all drowned lol