The Jebel Akhdar War ( ) or the Jebel Akhdar rebellion broke out Process_start in 1954 and again in 1957 in Oman , as an effort Influence by the local Omanis in the interior of Oman led by their elected Choosing Imam , Ghalib Alhinai , to protect Defending the Imamate of Oman from the occupation plans Arranging of Sultan Said bin Taimur , backed by the British government , who were eager to gain access Having_or_lacking_access to the oil wells in the interior lands of Oman .