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
The News Journal (Nigeria) hosted by the Ibadan office of Alliance Francaise. It also supported the Association of Communication and Language Arts Students (ACLAS) of the University of Ibadan in its 2013 Student Week. The News Journal has also earmarked NGN 100,000 in newspaper grants to the Department of Communication and Language Arts of the University of Ibadan, and continues to support the student Press Club. The News Journal (Nigeria) The News Journal is a community development newspaper serving the area that used to be known as Western State, Nigeria now comprising the main Yoruba states of Lagos, Ogun, Ondo, Osun, Oyo and Ekiti.