USS Cimarron (AO-22) was a oiler serving with the United States Navy and the second ship to be named for the Cimarron River in the Southwestern United States. She was launched 7 January 1939 by Sun Shipbuilding and Drydock Company, Chester, Pennsylvania; sponsored by Mrs. William D. Leahy; and commissioned 20 March 1939. World War II Cimarron cleared Houston on 31 May 1939 for Pearl Harbor, arriving on 21 July. She transported oil between west coast ports and Pearl Harbor, making 13 such voyages until she sailed for the east coast on 19 August 1940. After repairs and alterations, she began oil runs on the east coast, principally between Baton Rouge and Norfolk, until August 1941, when she took part in amphibious operations. From 5–16 September she put to sea with a transport convoy bound for Iceland, and voyaged north again from 12 October to 5 November to refuel ships at Placentia Bay. On 15 November 1941, she joined a convoy at Trinidad bound for Singapore with reinforcements, but was detached from the convoy on 9 December at Cape Town, South Africa. Returning to Trinidad on 31 December, she operated from Brazilian ports to Iceland until 4 March 1942, when she cleared Norfolk for San Francisco. Pacific War Cimarron reached San Francisco on 1 April 1942 and sailed the next day with the task force bound for the first air raid on Tokyo on 18 April. With , they fueled the fleet at sea before and after the raid, and returned to Pearl Harbor on 25 April. She sailed on 29 April, bound to join the force soon to join battle with the Japanese naval forces in the Coral Sea, but arrived after the battle to refuel destroyers at Nouméa, and returned to Pearl Harbor on 26 May. She cleared Pearl Harbor on 28 May to fuel the force which defeated the Japanese in the Battle of Midway and returned on 12 June, departing on 7 July to support the operation in the Solomon Islands. Using Nouméa as her principal base, Cimarron occasionally reloaded at Suva and Efate. After repairs at San Francisco in November 1942, she sailed for the forward area 18 December. She operated again out of Nouméa supporting the final stages of the Guadalcanal action, then fueled out of Efate, carried cargo to Sydney, Australia, and returned to fueling at Dumbea Bay in support of the occupation