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
History of the Yoruba people to earth. They became popular with their trading with the Portuguese, which gave them guns for their trade. The Yoruba people were invaded by the Fulani which pushed the people to the South. In the late 1800's, they formed a treaty with the Fulani people and were colonized with the British in 1901. The people who lived in Yorubaland, at least by the seventh century BC, were not initially known as the Yoruba, although they shared a common ethnicity and language group. The historical Yoruba develop "in situ", out of earlier (Mesolithic) Volta-Niger populations, by the 1st millennium BC. Archaeologically,