"Epping Forest" arrived off Aitape on 22 April 1944 for preinvasion bombardment, then sent her landing craft ashore in the assault and returned to Finschhafen to reload. She shuttled supplies to Aitape and Hollandia and repaired landing craft at Buna, and on 11 May reached Guadalcanal to load marines and their equipment for the invasion of Guam. After standing by in reserve during the invasions of Tinian and Saipan, she arrived off Guam 21 July for the assault landings. For five days she lay off the island repairing landing craft, and then returned to Guadalcanal, from which she made several voyages to Manus transporting landing craft through August.