The Oyo Empire was a Yoruba empire of what is today eastern Benin and western Nigeria (including Southwest zone and the western half of Northcentral zone). The Oyo Empire grew to become the largest Yoruba state. It rose through the outstanding organizational and administrative skills of the Yoruba people, wealth gainer from trade and its powerful cavalry. The Oyo Empire was one of the most politically important states in the entirety of Western Africa from the mid-7th to the late 18th century, holding sway not only over most of the other kingdoms in Yorubaland, but also over nearby African states, notably the Fon Kingdom of Dahomey in the modern Republic of Benin to the west