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
History of the Jews in Nigeria with lots of Jewish materials by different Rabbis. There are also key Synagogues in Port Harcourt and Lagos. The Jewish community among the Yoruba are often referred to as the Bnai Ephraim (Children of Ephraim). Most of them concentrated around various communities in Ondo state since the 1930s, about 2000 people in all. According to their traditions, they came to Nigeria by way of Morocco sometime in the 16th century after the expulsion of the Jews from Spain in 1492. Their language is a mixture of Moroccan Arabic with Yoruba, but with bits of Aramaic, such as ima for “mother.”