History of Africa usually governed by an "oba" and an "iwarefa", a council of chiefs who advised the "oba." by the 18th century, the Yoruba city-states formed a loose confederation, with the "Oni" of Ife as the head and Ife as the capital. As time went on, the individual city-states became more powerful with their "obas" assuming more powerful spiritual positions and diluting the authority of the "Oni" of Ife. Rivalry became intense among the city-states. The Oyo Empire rose in the 16th century. The Oyo state had been conquered in 1550 by the kingdom of Nupe, which was in possession of cavalry,
History of the Yoruba people intercity warfare amongst the Yoruba themselves. Archaeological evidence of the greatness of their ancient civilization in the form of, amongst other things, impressive architectural achievements like Sungbo's Eredo that are centuries old, nevertheless abound. Many Yoruba people organize themselves into villages, kingdoms, and towns. Major cities include the Ile-Ife, Oya, Lagos, Ibadan, Akure, and many other towns and cities. Some towns and cities of Yoruba people are their own civilization because people can share many of the same similarities. These cities are Warri, Benin city, Okene, and Auchi. Since the Yoruba religion started in Ile-Ife, the Yoruba diaspora has two