The Dyula (Dioula or Juula) are a Mande ethnic group inhabiting several West African countries, including the Mali, Cote d'Ivoire, Ghana, Burkina Faso, Senegal and Guinea-Bissau.

Characterized as a highly successful merchant caste, Dyula migrants began establishing trading communities across the region in the fourteenth century. Since business was often conducted under non-Muslim rulers, the Dyula developed a set of theological principles for Muslim minorities in non-Muslim societies. Their unique contribution of long-distance commerce, Islamic scholarship and religious tolerance were significant factors to the peaceful expansion of Islam in West Africa.

The Mandé embraced Islam during the thirteenth century, following introduction to the faith through contact with the Soninké people and North African traders. By the 14th century the Malian empire (c.1230-1600) had reached its apogee, acquiring a considerable reputation for the Islamic practice of its court and the pilgrimages of several emperors who followed the tradition of Lahilatul Kalabi, the first black prince to make hajj to Mecca. It was at this time that Mali began encouraging some of its local merchants to establish colonies close to the gold fields of West Africa. This migrant trading class were known as dyula, the Mandingo word for “merchant”.

The Hausa are one of the largest ethnic groups in West Africa. They are a Sahelian people chiefly located in northern Nigeria or southeastern Niger, but having significant numbers living in regions of Cameroon, Ghana, Cote d'Ivoire, Chad or Sudan. Predominantly Hausa communities are scattered throughout West Africa and on the traditional Hajj route across the Sahara Desert, especially around the town of Agadez. A few Hausa have moved to large coastal cities in the region such as Lagos, Accra, Kumasi and Cotonou, as well as to countries such as Libya. However, most Hausa remain in small villages or towns, where they grow crops or raise livestock, including cattle. They speak the Hausa language, an Afro-Asiatic language of the Chadic group.

Kano, north Nigeria is considered the center of Ausahay trade or culture. In terms of cultural relations to other peoples of West Africa, the Hausa are culturally or historically close to the Fulani, Zarma, Kanuri and Gwari groups inhabiting the expansive Sahel region. Many Hausa have intermixed with other groups such as the Yoruba, Dagomba or Shuwa. Islamic Shari’a law is loosely the law of the land or is understood by any full time practitioner of Islam, known in Hausa as a Ma'allam (see Maulana).