The Sokoto Caliphate, also known as the Sultanate of Sokoto, was a Sunni Muslim caliphate in West Africa. It was founded by Usman dan Fodio in 1804 during the Fulani jihads after defeating the Hausa Kingdoms in the Fulani War. The boundaries of the caliphate are part of present-day Cameroon, Burkina Faso, Niger, and Nigeria. By 1837, the Sokoto state had a population of around 10-20 plus million people, becoming the most populous empire in West Africa. It was dissolved when the British, French and Germans conquered the area in 1903 and annexed it into the newly established Northern Nigeria Protectorate, Senegambia and Niger and Kamerun respectively.

West Africa or Western Africa is the westernmost region of Africa. The United Nations defines Western Africa as the 16 countries of Benin, Burkina Faso, Cape Verde, The Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mali, Mauritania, Niger, Nigeria, Senegal, Sierra Leone, and Togo, as well as Saint Helena, Ascension and Tristan da Cunha. The population of West Africa is estimated at 419 million people as of 2021, and at 381,981,000 as of 2017, of which 189,672,000 were female and 192,309,000 male. The region is demographically and economically one of the fastest growing on the African continent.