History of the Yoruba people military capital of Ilorin, and then sacked and destroyed Ọyọ-Ile, the royal seat of the Ọyọ Empire. Following this, Ọyọ-Ile was abandoned, and the Ọyọ retreated south to the present city of Oyo (formerly known as "Ago d'Oyo", or "Oyo Atiba") in a forested region where the cavalry of the Sokoto Caliphate was less effective. Further attempts by the Sokoto Caliphate to expand southwards were checked by the Yoruba who had rallied in defence under the military leadership of the ascendant Ibadan clan, which rose from the old Oyo Empire, and of the Ijebu city-states. However, the Oyo hegemony had
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