ハウサ諸王国
The Hausa Kingdoms were independent political entities in what is now Northern Nigeria. The Hausa city states emerged as southern terminals of the Trans-Saharan caravan trade. Like other cities such as Gao and Timbuktu in the Mali Empire, these city states became centres of long-distance trade. Hausa merchants in each of these cities collected trade items from domestic areas such as leather, dyed cloth, horse gear, metal locks and Kola nuts from the rain forest region to the south through trade or slave raiding, processed (and taxed) them and then sent them north to cities along the Mediterranean. By the 12th century AD the Hausa were becoming one of Africa's major trading powers, competing with Kanem-Bornu and the Mali Empire. The primary exports were leather, gold, cloth, salt, kola nuts, slaves, animal hides, and henna. Certainly trade influenced religion. By the 14th century, Islam was becoming widespread in Hausaland as Wangara scholars, scholars and traders from Mali and scholars and traders from the Maghreb brought the religion with them.