Sofa is a Mandinka term for slave soldiers who served in the army of the Mali Empire. Sofas would also fight, in varying capacities, in the armies of later Mandé states such as the Bamana and Wassoulou empires.
The word sofa translates into English as "father of the horse" ("so" means horse, and "fa" means "father") or "guardian of the horse". This term stems from the original function of the sofa as a caretaker for the horse or horses of Mandinka cavalry commanders called "farari".
Sofas make their first appearance in oral and written records during the formation of the Mali Empire. Sofas were recruited from "jonow" (slaves) captured in battle or bought from afar. They could be depended on in most instances for obedience, since their livelihood depended entirely on their master. The institution of slavery in the Mali Empire heavily rewarded loyalty, and jonow could rise to civil or military positions of prominence. Jonow became part of their master's clan, and were often freed after a certain amount of years.
As part of the clan, jonow were expected to accompany their master's into battle and handle his horse and weapons. Initially forbidden from engaging in direct warfare, sofa eventually made up the majority of Mali's infantry army. As infantry, they were armed with bows and arrows by the state or, more accurately, royal clans devoted to the state.
In the forest and swampy areas of the Mali Empire, cavalry was minimized or altogether abandoned making sofas the exclusive instrument of war. Sofas were equipped with two quivers, and their bow was small by European standards. It could not fire very far or even powerfully, so sofas utilized deadly poisons and fired in arcs to give the arrows strength. Sofas also used flaming arrows, especially against fortifications that were often little more than thatch or wooden palisades.
Some sofas fought as cavalry, at least after being freed, such as Mansa Sakura whom started out his military career as a jonow of the Keita clan. He was freed by Sundjata Keita, became a cavalry commander of some renown and eventually usurped the throne of Mali.
During the 16th century, warriors from the crumbling Mali Empire invaded what is now Sierra Leone and Liberia. This resulted in the establishment of a loose federation of Mané states all paying homage to a single leader in a type of empire called Kquoja by visiting Europeans. The Mané came equipped with the tactics and equipment of the Mali Empire, but were forced to rely almost exclusively on infantry strategies in the jungle terrain.