Continuing to prowl off Japan, Greenling sank her last ship 10 November 1944 when she torpedoed old destroyer Patrol Boat 46. She returned to Pearl Harbor 23 November 1944. Twelfth war patrol, December 1944 – January 1945 Greenling's last war patrol, her 12th, was carried out in the Ryukyu Islands. Departing Pearl Harbor 26 December she found no targets until 24 January 1945, when she intercepted a nine-ship convoy. While making her approach, Greenling was attacked by escorts, and after a four-hour depth charge attack managed to make her escape. The submarine suffered minor damage and steamed to Saipan 27 January 1945 for repairs. There it was decided to send her to the United States, and Greenling steamed via Pearl Harbor, San Francisco, and the Panama Canal to Kittery, Maine. After overhaul at Portsmouth Naval Shipyard, the submarine decommissioned 16 October 1946 at New London, Connecticut. Post-war service Greenling was placed in service for the 1st Naval District in December 1946. Stationed at Portsmouth, she assisted in the training of reservists there and at Boston. The submarine continued this vital service until 18 March 1960, when she was placed out of service at Boston. She was sold 16 June 1960 to Minichiello Brothers, Chelsea, Massachusetts, and scrapped. Awards Presidential Unit Citation for her outstanding performance in her first three war patrols Asiatic-Pacific Campaign Medal with 10 battle stars for World War II service All of Greenling''′s war patrols except the fifth, tenth, and twelfth were designated "successful." References Citations Bibliography Hinman, Charles R., and Douglas E. Campbell. The Submarine Has No Friends: Friendly Fire Incidents Involving U.S. Submarines During World War II. Syneca Research Group, Inc., 2019. . External links hazegray.org: USS Greenling navsource.org: USS Greenling Gato-class submarines World War II submarines of the United States Ships built in Groton, Connecticut 1941 ships Maritime incidents in February 1942 Friendly fire incidents of World War II