USS Atascosa (AO-66) was an fleet oiler acquired by the U.S. Navy for use in World War II. She had the dangerous task of supplying fuel and ammunition to ships in and near, combat areas in both the Atlantic Ocean and the Pacific Ocean. SS Esso Columbia II was built at Chester, Pennsylvania, by the Sun Shipbuilding and Dry Dock Co. for the Standard Oil Company of New Jersey; launched on 7 September 1942; sponsored by Mrs. Harold G. McAvenia; renamed by the Navy Atascosa and designated AO-66 on 16 September 1942; purchased by the Navy on 12 October 1942: and commissioned on 9 November 1942.