The ship sortied with TG 32.5 on 6 September for the assault on the Palaus and, during a two-week period in mid-September, conducted pre-invasion bombardment and supported the landings on Peleliu and Angaur. On 29 September, she left for Manus Island. The destroyer remained there through 12 October, then sailed for the Philippines as a member of TG 77.2. On 17 October, "Grant" provided protection for while that fast transport landed troops on Suluan Island, Philippines. From 17 to 24 October, the destroyer provided fire support for the assault on Leyte.