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
History of the Yoruba people amala (yam flour). The ethnic group also holds musical and cultural festivals. The Yoruba eventually established a federation of city-states under the political ascendancy of the city state of Oyo, located on the Northern fringes of Yorubaland in the savanna plains between the forests of present Southwest Nigeria and the Niger River. Following a Jihad led by Uthman Dan Fodio and a rapid consolidation of the Hausa city states of contemporary northern Nigeria, the Fulani Sokoto Caliphate invaded and annexed the buffer Nupe Kingdom. It then began to advance southwards into Ọyọ lands. Shortly afterwards, its armies overran the Yoruba