On 16 April, she returned to Kerama Retto for availability; then resumed patrol and sweeping duties which she continued until sailing for Ulithi on 4 May. On 28 May, Serene returned to the Ryukyus in the screen of convoy UOK 16. Early in June, she shifted from Nakagusuku Wan (Buckner Bay) to Kerama Retto, off which she performed patrol duty until the 7th; A week later, she resumed sweeping operations which she continued in the Mayako Jima area until the 23d. In early July, she escorted an LST convoy to Leyte where she was undergoing overhaul when hostilities ended in mid-August. Then assigned to post-war minesweeping operations Serene swept mines in the Yellow Sea, off Korea, during late August and early September. On 7 September, her group became the Sasebo Sweep Group; and, on the 9th Serene commenced operations to clear the entrance to Nagasaki. For the remainder of the month, she continued sweeping operations off the west coast of Kyūshū. In October, she assisted in clearing the eastern end of Tsushima Strait; and, in early November, she returned to the waters off Korea to operate off the east coast in the Sea of Japan. At mid-month, she resumed operations in the Tsushima Strait to clear the shallow waters at the western end. On 12 December, she sailed for home. Designated for inactivation Serene arrived at Galveston, Texas, on 26 January 1946. On 8 May, she shifted to Orange where she was decommissioned on 19 July and berthed with the Texas Group, Atlantic Reserve Fleet. Serene earned 3 battle stars during World War II and 3 during post-war minesweeping operations. Reclassified MSF-300 on 7 February 1955, Serene remained in reserve until July 1963. Converted to a patrol and escort craft, she was transferred, under the Military Assistance Program, to the South Vietnam on 24 January 1964. Her name was struck from the Naval Vessel Register on 1 August 1964. Republic of Vietnam Navy The former Serene was renamed RVNS Nhật Tảo (HQ-10) in Republic of Vietnam Navy service; Nhật Tảo translates to “serene”. On 7 August 1967, North Vietnamese forces began to overrun Coastal Group 16’s base at Sông Trà Khúc River, about 70 miles southeast of Đà Nẵng. Nhật Tảo delivered heavy fire on enemy forces. and arrived in support. After several hours of naval gun fire, one U.S. and two ARVN infantry companies arrived and launched a counterattack