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Jebel Akhdar War

Sultan Said bin Taimur expressed his interest in occupying the Imamate right after the death of Imam Alkhalili, thus taking advantage of any potential instability that might occur within the Imamate when elections were due, to the British government. The British political agent in Muscat believed that the only method of gaining access to the oil reserves in the interior was by assisting the sultan in taking over the Imamate. In 1946, the British government offered arms and ammunition, auxiliary supplies and officers to prepare the sultan to attack the interior of Oman. In May 1954, Imam Alkhalili died and Ghalib Alhinai was elected Imam. Relations between the Sultan Said bin Taimur, and Imam Ghalib Alhinai frayed over their dispute about oil concessions.

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. The Omanis in the interior led by Imam Ghalib Alhinai, Talib Alhinai, the brother of the Imam and the Wali (governor) of Rustaq, and Suleiman bin Hamyar, who was the Wali (governor) of Jebel Akhdar, defended the Imamate in the Jebel Akhdar War against British-backed attacks by the Sultanate. In July 1957, the Sultan's forces were withdrawing, but they were repeatedly ambushed, sustaining heavy casualties. Sultan Said, however, with the intervention of British infantry (two companies of the Cameronians), armoured car detachments from the British Army and RAF aircraft, was able to suppress the rebellion. The Imamate's forces retreated to the inaccessible Jebel Akhdar.

Colonel David Smiley, who had been seconded to organise the Sultan's Armed Forces, managed to isolate the mountain in autumn 1958 and found a route to the plateau from Wadi Bani Kharus. On 4 August 1957, the British Foreign Secretary gave the approval to carry out air strikes without prior warning to the locals residing in the interior of Oman. Between July and December 1958, the British RAF made 1,635 raids, dropping 1,094 tons and firing 900 rockets at the interior of Oman targeting insurgents, mountain top villages, water channels and crops. On 27 January 1959, the Sultanate's forces occupied the mountain in a surprise operation. Imam Ghalib, his brother Talib and Sulaiman managed to escape to Saudi Arabia, where the Imamate's cause was promoted until the 1970s. The exiled partisans of the now abolished Imamate of Oman presented the case of Oman to the Arab League and the United Nations. On 11 December 1963, the UN General Assembly decided to establish an Ad-Hoc Committee on Oman to study the 'Question of Oman' and report back to the General Assembly. The UN General Assembly adopted the 'Question of Oman' resolution in 1965, 1966 and again in 1967 that called upon the British government to cease all repressive action against the locals, end British control over Oman and reaffirmed the inalienable right of the Omani people to self-determination and independence.