The battleship was under fire at Wonsan 27–29 May, but her five-inch (127 mm) guns silenced the counter-fire, and her 16-inch shells destroyed five gun emplacements and four gun caves. She also hit a target that flamed spectacularly: either a fuel storage area or an ammunition dump. "New Jersey" returned to the key task of direct support to troops at Kosong 7 June. On her first mission, she completely destroyed two gun positions, an observation post, and their supporting trenches, then stood by on call for further aid. She then sailed back to Wonsan for a day-long bombardment 24 June, aimed at guns placed in caves. The results were excellent, with eight direct hits on three caves, one cave demolished, and four others closed. Next day she returned to troop support at Kosong, her assignment until 10 July, aside from necessary withdrawal for replenishment.