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 Venezuela, Saint Lucia, Jamaica, Brazil, Grenada, and Trinidad and Tobago, and other countries. As an ethnic description, the word "Yoruba" (or more correctly, "Ya raba") was originally in reference to the Oyo Empire and is the usual Hausa name for Oyo people as noted by Hugh Clapperton and Richard Lander. It was therefore popularized by Hausa usage and ethnography written in Ajami during the 19th century by Sultan Muhammad Bello. The extension of the term to all speakers of dialects related to the language of the Oyo (in modern terminology North-West Yoruba) dates to the second half of the 19th