1942 and 1943
Frazier arrived at Noumea, New Caledonia, 9 December 1942 in the escort for a group of troop transports. She served on escort and patrol in the South Pacific for the next 4 months, guarding transports to Guadalcanal, patrolling off Espiritu Santo, and covering escort carriers as they patrolled the waters between Efate and the Solomon Islands. On 18 March 1943, Frazier departed Efate bound for Pearl Harbor and a rendezvous with a task force assigned to operate in the Aleutian Islands.
After firing in the preinvasion bombardment, Frazier covered the landings on Attu 11 May 1943, and patrolled off that island and Kiska, Alaska. On 12 May, she sighted two periscopes and opened gunfire on I-31 who dived quickly but not before Frazier had scored hits on the periscopes. Immediately gaining sonar contact, the destroyer began a depth charge attack which brought air bubbles, oil, and debris to the surface. Two more attacks ensured the submarine was sunk.
Early in the foggy morning of 10 June, with Lieutenant Commander Elliot M. Brown in command, she made two separate attacks on radar contacts which were believed to be submarines. In the second attack, the destroyer's guns fired for five minutes as she pursued her target until its radar echo merged with land echo of Kiska. Late that night and again on the morning of 11 June, Frazier dropped depth charges on two different underwater contacts, but was unable to determine the results of these attacks; it is likely she sank I-9 in one of them.
On 2 and 12 August, she fired shore bombardment on Kiska, then covered the unopposed landings of 15 August. She continued to screen large combatants in the Aleutians until early September, when she began a brief overhaul at Puget Sound.
Frazier sailed to Wellington, New Zealand, to join the escort for transports assigned to the Gilbert Islands operation. Between 7 and 13 November 1943 the group rehearsed at Efate, then sailed on to Tarawa, where Frazier provided preassault bombardment and call-fire support to the troops landed 20 November. Patrolling off Betio, on 22 November, Frazier joined Meade in attacking I-35. After the two destroyers had depth-charged I-35 to the surface, they attacked it with gunfire, and Frazier finally sent her to the bottom by ramming. Her bow was badly damaged, but none of her men was injured. Two days later, she sailed for repairs and training at Pearl Harbor.
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