He ruled the old Oyo Empire, which extended from the present-day Benin republic to Nigeria, originating from states in the South East and West to the North. The people under him are called Yoruba people and spoke the Yoruba Language.
The leader of the old Oyo Empire had control over regions that included present-day Benin Republic and parts of Nigeria, starting from areas in the South East and West to the North. His subjects were known as Yoruba people who spoke the Yoruba language.