Page "History of Nigeria" Paragraph 27

During the 15th century Oyo and Benin surpassed Ife as political and economic powers, although Ife preserved its status as a religious center.

Respect for the priestly functions of the oni of Ife was a crucial factor in the evolution of Yoruban culture.

The Ife model of government was adapted at Oyo, where a member of its ruling dynasty controlled several smaller city-states.

A state council ( the Oyo Mesi ) named the alafin ( king ) and acted as a check on his authority.

Their capital city was situated about 100 km north of present-day Oyo.

Unlike the forest-bound Yoruba kingdoms, Oyo was in the savanna and drew its military strength from its cavalry forces, which established hegemony over the adjacent Nupe and the Borgu kingdoms and thereby developed trade routes farther to the north.