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 Atlantic world domains, the Yorubas were known by the designations: "Nagos/Anago", "Terranova", "Lucumi" and "Aku", or by the names of their various clans. The Yoruba left an important presence in Cuba and Brazil, particularly in Havana and Bahia. According to a 19th-century report, "the Yoruba are, still today, the most numerous and influential in this state of Bahia. The most numerous are those from Oyo, capital of the Yoruba kingdom". Others included Ijexa (Ijesha), Lucumi Ota (Aworis), Ketus, Ekitis, Jebus (Ijebu), Egba, Lucumi Ecumacho (Ogbomosho), and Anagos. In the documents dating from 1816 to 1850, Yorubas constituted 69.1% of all