Empress Augusta Bay
After a month's overhaul at Mare Island Navy Yard, "Trever" steamed for Pearl Harbor on 8 October 1943 and touched there briefly before heading for Guadalcanal. On 11 November 1943, she joined the screen for the transport and escorted her to Empress Augusta Bay off Bougainville Island. Later that month, "Trever" took part in the landings at Cape Torokina on Bougainville, which began the Bougainville campaign.