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
Oyo Empire moved further south, to Ago d'Oyo. Oba Atiba sought to preserve what remained of Oyo by placing on Ibadan the duty of protecting the capital from the Ilorin in the north and northeast. He also attempted to get the Ijaye to protect Oyo from the west against the Dahomeans. The center of Yoruba power moved further south to Ibadan, a Yoruba war camp settled by Oyo commanders in 1830. Atiba's gambit failed, and Oyo never regained its prominence in the region. Oba Atiba otherwise called Atiba Atobatele died in 1859; His son Adeyemi I and the 3rd Alaafin to rule