Selfridge depth charged and may have damaged an enemy submarine. Guadalcanal Selfridge returned to Pearl Harbor on 6 February 1942 and was under way again on the 9th to escort Saratoga to Bremerton, Washington for permanent repairs. In mid-March, she returned to Hawaii in the screen of a convoy and, by the end of the month, had escorted more supplies to Canton. In April, she carried Marine Corps personnel and mail to Palmyra and Christmas islands, and then proceeded to Bora Bora in the Society Islands, to rendezvous with and escort convoys carrying reinforcements to the Samoan and Tonga groups. On 21 May 1942, she departed the latter group for the New Hebrides and Australia; where, by the end of the month, she had commenced coastal escort work. A unit of TF 44, she remained in Australian waters into July; then, with others of the force, proceeded to the Fiji Islands to rehearse for Operation Watchtower, the assault and occupation of Guadalcanal and Tulagi. Soon after 0120 on 7 August 1942, TF 44, now designated TG 62.6, the screening group for the transports, arrived in the Guadalcanal area. At 0620, Selfridge opened fire on a small gasoline carrier entering Tulagi harbor. A few hours later, the transports moved in toward the beaches. At 1320, the Japanese sent in a high level bombing attack. Shortly thereafter, they followed that strike with a dive bomber attack. On the 8th, Selfridge continued to screen the transports and, after a noon bombing attack, picked up two Japanese airmen. On the morning of the 9th, she assisted survivors of the Battle of Savo Island and, with Ellet, scuttled the badly-damaged Australian cruiser, Canberra; then, toward evening, departed the area to escort the transports to Noumea. For the remainder of the month, the Australian group (TF 44) screened the carriers of the air support group. On 31 August 1942, the ships headed back to Brisbane; and, for the next nine months, Selfridge continued to operate with that force in the Coral Sea to prevent a Japanese landing at Port Moresby and to cover Allied shipping to the Papuan Peninsula. Battle of Vella Lavella In May 1943, Selfridge was reassigned to the 3rd Fleet. On the 12th, she arrived at Nouméa. Through the summer, she operated with cruisers of TF 36, later TF 37, and participated in exercises with TF's 38, 39, and 34. In late September,