After retiring from Iwo Jima on 28 February, "Wrangell" proceeded to the Marianas and arrived at Saipan on 3 March. From that island, she proceeded independently to Ulithi where she anchored three days later. On the 13th, the ammunition ship sortied with Task Group (TG) 58.8 and supported Task Force (TF) 58 over the ensuing days as it attacked enemy shore installations and shipping in preparation for the invasion of the Ryūkyūs and hit Okinawa itself when troops finally landed on that island on 1 April.