"Hall" next joined the escort for a group of 12 fleet oilers whose job it was to supply vital fuel to units of the 5th Fleet during the Marianas operations. She made two fuelling voyages from Majuro to the Marianas, then shifted her base to Seeadler Harbor, Admiralty Islands, on 26 August to screen refuelling and replacement units during the operations for the capture of the Carolines. "Hall" continued this duty until 24 November.