Arriving at Tinian on 27 July, the ship commenced offloading immediately and was working hard at the task on 5 August when an American B-29 bomber exploded an atomic bomb over Hiroshima. "Trousdale" completed discharging her cargo on the 8th and shifted her anchorage to Saipan the same day. While she was anchored there on 15 August, word came through that Japan had accepted the terms of the Potsdam Declaration and capitulated to the Allies. The long and bloody war in the Pacific was over.