Oyo Empire could act as a buffer between Oyo and Imperial Benin. By the end of the 16th century, the Ewe and Aja states of modern Benin were paying tribute to Oyo. The reinvigorated Oyo Empire began raiding southward as early as 1682. By the end of its military expansion, Oyo's borders would reach to the coast some southwest of its capital. It met little serious opposition until the early 18th century. In 1728, the Oyo Empire invaded the Kingdom of Dahomey in a major campaign of its cavalry. Dahomey warriors, on the other hand, had no cavalry but many firearms. Their
Yoruba people Africa. The historical Yoruba develop "in situ", out of earlier Mesolithic Volta-Niger populations, by the 1st millennium BCE. Oral history recorded under the Oyo Empire derives the Yoruba as an ethnic group from the population of the older kingdom of Ile-Ife. The Yoruba were the dominant cultural force in southern Nigeria as far back as the 11th century. The Yoruba are among the most urbanized people in Africa. For centuries before the arrival of the British colonial administration most Yoruba already lived in well structured urban centres organized around powerful city-states ("Ìlú") centred around the residence of the "Oba". In