Doyen was the second ship to carry the name of Marine Brigadier General Charles A. Doyen. Consolidated Steel launched her at Los Angeles on 9 July 1942, and Miss F. D. Johnson, his granddaughter, sponsored her. She was renumbered from AP-2 to APA-1 on 1 February 1943 and was of the Doyen class. The Navy acquired her on 20 April 1943 and had Bethlehem Steel convert her at San Pedro. Commander P. F. Dugan took command when she was commissioned on 22 May 1943.
On 9 July 1943 she left San Francisco with soldiers for the Aleutians and took part in the Kiska landings from 14 to 21 August. Pearl Harbor was a stop on the way home. She was in San Francisco again on 11 September. A week later she cleared San Diego, picked up Marines at Pearl Harbor, and reached Wellington on 24 October. On 1 November she sailed with the 2d Marines for the Gilberts. Between 20 and 24 November she put those men ashore at Tarawa and embarked casualties while shore guns and torpedo planes attacked.
The passengers went on to Pearl Harbor. West-coast training followed, and she arrived at San Diego on 18 December. She got underway on 13 January 1944 for Kwajalein, sent her troops in on the final day of January, and on 16 February reached Pearl Harbor with casualties and prisoners of war. Hawaiian training kept her until 30 May. She then went to Eniwetok, on to Saipan for the landings of 16 to 22 June, and to Guam from 22 to 28 July.
Manus, on 3 October 1944, was where she joined the Philippine movement. On 20 October, and again on the 21st, assault troops left her boats in Leyte Gulf. Reinforcements waited at Humboldt Bay in New Guinea. She brought them up and landed them in the same gulf on 18 November, and Manus saw her again on 24 November. Army troops came aboard at Cape Torokina on Bougainville, drilled in Huon Gulf, and stepped ashore in Lingayen Gulf across 9 and 10 January 1945. Ulithi repaired her after that. Guam supplied cargo and a Marine draft. She sailed on 16 February and was in the opening Iwo Jima landing on 19 February. Casualties taken off the island were landed at Saipan on 9 March. She carried naval constructors to Guam and on 23 March entered Noumea for repairs and further training.
On 3 May 1945 she left Noumea with troops for San Pedro Bay at Leyte, embarked patients at Guam, and reached San Diego on 17 June. A full overhaul came next. From 28 September to 30 December she shuttled troops, and men heading home, from the west coast out to Pearl Harbor and back. She sailed from Seattle on 4 January 1946 and was in New York on 4 February. The Navy decommissioned her on 22 March 1946, and on 26 June the Maritime Commission accepted her for disposal. She afterward went to the Massachusetts Maritime Academy. Christened USTS Bay State in 1957, she served as a training ship until 1972 and was then sold for scrap. Six battle stars were awarded.