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 by Protestants, whose prominent member - Church Mission Society (CMS) based in England made the most significant in-roads into the hinterland regions for evangelism and became the largest of the Christian missions. Methodists (known as Ijo-Eleto, so named after the Yoruba word for "method or process") started missions in Agbadarigi / Gbegle by Thomas Birch Freeman in 1842. Henry Townsend, C.C.Gollmer, and Ajayi Crowther of the CMS worked in Abeokuta, then under the Egba division of Southern Nigeria in 1846. Hinderer and Mann of CMS started missions in Ibadan / Ibarapa and Ijaye divisions of the present Oyo state in