"Loeser" left Ulithi 5 March for the invasion of Iwo Jima. She arrived the 19th, and began nine long days of antisubmarine patrol. She then steamed eastward, touching Eniwetok on 2 April and arriving Pearl Harbor the 13th. During the final months of the Pacific war, the battle-tested destroyer escort remained in Hawaiian waters and contributed her invaluable experience to the already rigorous submarine training program.