She completed her participation during the first week in August and departed the Marianas and headed for Espiritu Santo in the New Hebrides. She arrived in Segond Channel on 16 August and began preparations for the invasion of the Palau Islands. Those preparations included amphibious support training in the Solomon Islands. The "White Plains" and ten other aircraft carriers moved into the vicinity of the Palaus during the second week of September. Their planes provided a portion of the prelanding bombardment and support for the troops after the assault on 15 September. In contrast to the Marianas campaign and later operations, the Palaus, though extremely difficult on the troops ashore, brought little opposition to the ships in the waters surrounding the islands. No enemy air attacks developed because the Japanese were husbanding their aircraft for the defense of the Philippines, and as a result of Japan's new strategic concept of defense in depth at some distance from the beaches, few shore batteries were sited near enough to the coast to fire upon ships. On 21 September, the "White Plains" joined the forces detached from the Palau operation for the occupation of Ulithi Atoll, which to everyone's relief, was undefended.