The USS Aucilla (AO-56) was a fleet oiler of the United States Navy, commissioned in 1944. It played a crucial role during World War II by providing fuel and supplies to naval vessels in the Pacific Theater. The ship supported various operations, including the invasion of the Philippines and the Battle of Iwo Jima. After the war, the USS Aucilla continued to serve during the Korean War and the Vietnam War, supplying fuel to ships and aircraft. It was decommissioned in 1970 and later sold for scrap in 1974, concluding its service to the U.S. Navy.