She supported Allied efforts around New Georgia-Rendova Vangunu from 29 June to 25 August. Assigned to Task Unit 36.2.2, she, "Preble" and "Gamble" laid mines off Shortland Harbor, Bougainville. She then supported the occupation and defense of Cape Torokina conducting minesweeping duties there from 1 to 8 November. She later supported the Leyte landings from 12 to 24 October 1944. She was subsequently among the ships to support the Lingayen Gulf landings from 4 to 18 January 1945. She supported the Battle of Iwo Jima from 7 February to 7 March. She undertook mine duties supporting the Battle of Okinawa between 25 March and 30 June. In her final act of the war, she steamed in support of the United States Third Fleet near mainland Japan between 5 and 31 July. In August and September 1945 "Breese" swept mines in the East China Sea and Kyūshū-Korean area following the end of the war.