レンドバ島
Having been overhauled, "Gwin" returned to the Southwest Pacific on 7 April 1943 to escort troop reinforcements and supplies throughout the Solomons. On 30 June she served with the massive amphibious assault force converging on New Georgia under the leadership of Rear Admiral Richmond K. Turner. She supported the landings of 30 June on the north coast of Rendova Island, across Blanche Channel from Munda. Immediately after the first wave of troops hit Rendova Beach, Munda Island shore batteries opened fire on the four destroyers patrolling Blanche Channel. "Gwin" was straddled by the first salvo. A moment later a shell exploded on her main deck aft, killing three men, wounding seven and stopping her after engine. The half-dozen enemy shore batteries were soon silenced as "Gwin" laid down an effective heavy smoke screen to protect the unloading transports. When aerial raiders appeared, her gunners shot down three. Rendova Island was soon in American possession. It served as an important motor torpedo boat base to harass Japanese barge lines and a base for air support in the Solomons.