Oyo Empire metropolitan Oyo. This may have been fine in the 15th century when Oyo controlled only its heartland. But to make and maintain farther conquest, the structure underwent several changes. Oyo maintained a semi-standing army of specialist cavalry soldiers called the "Eso", the "Esho" or, formally, the Eso of Ikoyi. These were 70 junior war chiefs who were nominated by the Oyo Mesi and confirmed by the Alaafin of Oyo. The Eso were appointed for their military skill without regard to heritage and were led by the Are-Ona-Kakanfo. After Oyo's return from exile, the post of Are-Ona-Kakanfo was established as the
Yoruba Academy will be maintained by the Academy to set a standard for the Yoruba language. South-West Yoruba in Nigeria: Ekiti State, Lagos State, Ogun State, Oyo State, Osun State, Ondo State, parts of Kwara State, Kogi State, Edo State, Delta State and Niger State Diaspora Yoruba outside Nigeria in Africa: in Togo, Benin, Sierra Leone and parts of Ghana Diaspora Yoruba outside Africa: in Haiti, Cuba, Puerto Rico, Brazil, United States, UK, [(Ireland)] Yoruba Academy The Yoruba Academy is a multi-disciplinary institution that brings together scholars, politicians, businessemen and experts in Yoruba language, culture, economics, law, science and technology, and governance.