He returned to Oman in 1966 and was the subject of appreciable restrictions from his father. In 1970, Qaboos ascended on the Omani throne following overthrowing his father in the coup d'état, with British guidance. The nation was subsequently renamed the Sultanate of Oman. Sultanate of Zanzibar: two incumbents (in https://sultan-6666554.blog-ezine.com/32486514/a-review-of-sultan66