Oyo Empire culture in Oyo where victory was obligatory and defeat carried the duty of committing suicide. This do-or-die policy no doubt contributed to the military aggressiveness of Oyo's generals. The Oyo Empire was the only Yoruba state to adopt cavalry; it did so because most of its territory was in the northern savannah. The origin of the cavalry is disputed; however, the Nupe, Borgu and Hausa in neighboring territories also used cavalry and may have had the same historical source. Oyo was able to purchase horses from the north and maintain them in metropolitan Oyo because of partial freedom from the
Yoruba people variety taught in schools and spoken by newsreaders on the radio, has its origin in the Yoruba grammar compiled in the 1850s by Bishop Samuel Ajayi Crowther, who himself was a creole from Sierra Leone. Though for a large part based on the Oyo and Ibadan dialects, it incorporates several features from other dialects. As of the 7th century BCE the African peoples who lived in Yorubaland were not initially known as the Yoruba, although they shared a common ethnicity and language group. By the 8th century, a powerful Yoruba kingdom already existed in Ile-Ife, one of the earliest in