Following outfitting at Seattle, Washington, and shakedown training along the California coast, "Triumph" stood out of San Francisco, California, on 1 May as a unit in the escort of an Oahu-bound convoy. She arrived in Pearl Harbor on the 10th and, after a five-day layover, joined the screen of a convoy bound for the Marshall Islands. She entered the lagoon at Majuro on 25 May; two days later, headed back to Hawaii with 24 passengers embarked; and reached Pearl Harbor on 2 June. She got underway again late in the month to escort another convoy to the Marshalls. She reentered Pearl Harbor on 16 July and prepared for her first deployment in the combat zone.