succeeded in sinking auxiliary minesweeper Noshiro Maru No.2 (126 tons) on 17 April, before returning to Pearl Harbor on 10 May 1944. Tenth and eleventh war patrols, October 1944 – March 1945 Her tenth war patrol was eventful as the Pacific war drew close to its climax. With Commander Roach in Haddock commanding, she formed an attack group with and , departing Pearl Harbor on 8 October. Moving to support the invasion of the Philippines, the submarines were present during the battle off Cape Engaño, part of the epochal Battle for Leyte Gulf, on 25 October and unsuccessfully pursued some of the retiring Japanese units. Bothered by a malfunctioning periscope, Haddock scored no hits on the rest of her patrol and returned to Pearl Harbor on 10 December. Fitted out with extra deck guns for her eleventh war patrol, Haddock sailed in company with submarines and for the seas east of Japan. The boats made a diversionary sweep designed to pull early warning craft away from the intended track of a carrier group en route for air strikes against Tokyo. Gaining their objective with complete success, the submarines attacked the picket boats with gunfire, allowed them to send contact reports, and then sank several, diverting Japanese efforts away from the undetected carrier group. Haddock returned to Guam on 14 March 1945. Last war patrols, April – August 1945 Haddock spent her twelfth and thirteenth war patrols on lifeguard station near Tokyo, standing by to rescue downed airmen after raids on Japanese cities. This duty occupied her from April until her return to Pearl Harbor on 22 August. Haddock departed for the East Coast of the United States on 7 September and after transiting the Panama Canal and visiting various ports on the East Coast, arrived at New London, Conn., on 29 March 1946, nearly four years after she had sailed from the North Atlantic to victory. She was placed in reserve in commission on 20 April and decommissioned on 12 February 1947. In August 1948 Haddock was assigned duty as a reserve training ship for 6th Naval District, and served in that capacity until being again placed out of service at New London in May 1952. She was again assigned to reserve training, this time at Portsmouth, N.H., June 1956, and finally was struck from the Naval Vessel Register and sold for scrap to Jacob Checkoway on 23 August 1960.