In the months that followed, the ship was first used around Guadalcanal , then with the Aleutians . This was followed by operations in the conquest of the Marshall Islands and as part of securing carrier combat groups in the reconquest of New Guinea . After the Mustin had mainly escorted convoys during the various landing operations in the Philippines, she covered the landings on Okinawa in April 1945 together with the destroyers USS Russel , Morris and many other naval units .
It was the in July 1946. atomic bomb tests in the lagoon of Bikini Atoll exposed to this but survived. Ultimately, she was decommissioned a little later (late August 1946) and sunk on April 18, 1948 by artillery fire as a target ship at Kwajalein .