In December 1955, Sultan Said bin Taimur sent troops of the Muscat and Oman Field Force to occupy the main centres in Oman, including Nizwa, the capital of the Imamate of Oman, and Ibri.
Sultan je na podlagi pogodbe iz Siba iz leta 1920 od naftne družbe zahteval posebne pravice pri trgovanju z nafto.