called en route at Mios Woendi, where she took on board of supplies for Philippine guerrillas, along with 16 soldiers headed for behind-the-lines operations in Luzon. Although not permitted by her orders to attack escorted merchantmen while on this mission, Cero encountered two small craft on 27 October, and in a resulting gun action, damaged both and forced them ashore. On 3 November, north of Manila, she made contact with the guerrillas, landed the soldiers and supplies, and took aboard four evacuees. Later attacked by a Japanese submarine, an alert bridge crew, led by Jim "Red Dog" Vermillion, enabled Cero to evade a torpedo aimed at her. Mission completed, she returned to Pearl Harbor 24 November, then sailed to the West Coast for overhaul. Seventh War PatrolCero, now commanded by Raymond Berthrong, shoved off for action from Pearl Harbor once more 31 March 1945, on her seventh and most productive war patrol. Cruising off Honshū and Hokkaidō, she not only provided lifeguard services for air strikes on Japan, but sank two picket boats and damaged a third, as well as sending three freighters and a large trawler to the bottom. Eighth War Patrol Refitted at Guam and Saipan between 27 May and 27 June 1945, Cero, commanded by Raymond Berthrong, had lifeguard and picket duty off Honshū for her eighth war patrol. On 15 July, she rescued three survivors of a downed bomber, and later that day bombarded the Japanese lighthouse and radio station at Shiriya Saki, Honshū. On 18 July, while sailing for the Kurile Islands, Cero came under enemy air attack; a bomb that landed close aboard caused damage so extensive that the sub was forced to cut short her patrol and head for Pearl Harbor, where she arrived 30 July. Post-World War IICero made prolonged visits to New Orleans and Baton Rouge before arriving 5 November 1945 at New London, where she was decommissioned and placed in reserve 8 June 1946. She was recommissioned 4 February 1952, and on 22 March, Cero arrived at her new home port of Key West, Florida. For the next year she cruised in the Caribbean Sea and aided in the work of the Fleet Sonar School, then sailed north for inactivation. She was again decommissioned and placed in reserve at New London 23 December 1953.Cero also served as a reserve pierside training vessel at the Detroit Naval Armory across from Belle