He returned to Oman in 1966 and was the topic of substantial limits from his father. In 1970, Qaboos ascended to the Omani throne after overthrowing his father in a coup d'état, with British guidance. The region was subsequently renamed the Sultanate of Oman. Sultanate of Zanzibar: two incumbents (from https://sultan-6677665.idblogz.com/33434333/not-known-details-about-sultan-66