サハラ交易
Bono Manso [literally "On the state of Bono"]) sometimes known as Bono Mansu was a trading area in the ancient state of Bonoman, and a major trading centre in what is now predominantly Bono East region. Located just south of the Black Volta river at the transitional zone between savanna and forest, the town was frequented by caravans from Djenné and Timbuktu as part of the Trans-Saharan trade. Goods traded included kola nuts, salt, leather, and gold; gold was the most important trading good of the area, starting in the mid-14th century.