Concept:The Sokoto Caliphate had two supreme administrative headquarters, each controlling a different part of the empire.Explanation:The Sokoto Caliphate was divided into two major spheres of control.The headquarters at Sokoto supervised the eastern section of the empire.The headquarters at Gwandu supervised the western section.Therefore, the Emir of Sokoto headed the eastern empire.Places such as Yauri were included in this eastern zone.Answer:Eastern.