"Colhoun" arrived at Pearl Harbor 10 October 1944 for training and patrol duty. Arriving off Iwo Jima 19 February 1945, she screened transports, served as radar picket and gave fire support for the invasion of Iwo Jima. On 1 March, she was hit by a salvo from heavy enemy batteries ashore, which killed one man and injured 16. After repairs at Saipan, "Colhoun" sailed for Okinawa, arriving 31 March for radar picket duty.