After completing conversion,
Matar steamed to
Norfolk, Virginia, 28 May, for
shakedown in
Chesapeake Bay. Thence, she loaded cargo at
Davisville, Rhode Island, and
Bayonne, New Jersey, before departing
New York, for the
Pacific Ocean 25 June, arriving
Pearl Harbor, 25 July.
Matar discharged cargo and refilled her holds with ammunition,
field rations, and amphibious equipment. Operating under
Service Squadron 8, she sailed with units of
task force TF 31 on 20 August, for the
Palaus. Steaming via the
Marshalls and the
Admiralties,
Matar reached
Kossol Passage, 20 September. As
flagship for CTG 31.4, she operated at
Kossol, until 17 October, when she departed for
Angaur Island. From 19 to 24 October, she discharged cargo into boats for transfer to the beaches; thence, she embarked
Marines and amphibious tanks at
Peleliu, and sailed for the
Russell Islands, 30 October. She debarked her troops there 7 November; arrived off
Guadalcanal, 9 November; and embarked 130 troops. Departing Lunga, 18 November, she arrived
San Francisco, California, via Pearl Harbor, 11 December. Altered for duty as a
stores issue ship and loaded with medical supplies and ship's stores,
Matar departed San Francisco, 18 January 1945, and arrived
Eniwetok, 8 February. Assigned to Service Squadron 10, she steamed to the
Marianas between 10 and 14 February. For the next 3 months she operated out of
Saipan and
Guam, dispensing medical and general stores to the fleet.
Matar arrived
Kerama Retto, the
Ryūkyūs, 14 May; discharged some cargo; and shifted to the anchorage off
Hagushi,
Okinawa, 29 May. She issued dry provisions and medical stores, and in addition provided smoke cover during enemy airstrikes. On 27 June, she sailed for
Ulithi and Pearl Harbor. Replenishing there between 2 and 14 August, she steamed to Eniwetok, thence to
Japan, 7 September, arriving
Tokyo Bay, 15 September, to service ships on occupation duty in Japanese waters. She completed this duty early in November, and between 5 November and 1 December, steamed via Pearl Harbor, to San Francisco. ==Decommissioning==