Assigned to the United States Pacific Fleet, the transport departed San Francisco, on 21 July 1945 for a shakedown cruise which took her to San Diego and Los Angeles. She returned to her home port on 16 August – two days after hostilities with Japan ended – and embarked fresh troops to replace veterans in the Far East. She transited the Golden Gate on 21 August and proceeded via Ulithi to the Philippines. Following stops at San Pedro Bay, Leyte, Batangas and Manila, Luzon, she headed home and reached San Francisco early in October.
Then, following a second round-trip voyage to the Philippines, she again got underway from San Francisco in December and set course for Nagoya, Japan. This shuttle run ended in Los Angeles on 3 January 1946. Another voyage to Yokohama took her back to Seattle, Washington. Early in March, she sailed from that port with occupation troops and delivered them to Okinawa.
Transferred to the US Army
From that island in the Ryukyu Islands, the ship sailed, via the Panama Canal, for the East Coast of the United States. She reached New York on 14 May, was decommissioned on that day, and was transferred to the War Department later that month. The ship entered the Bethlehem New York yard at 56th Street on 3 June to receive the repairs and modifications she would require upon assuming a slightly different role. She got underway again on 1 August and served the U.S. Army Transport Service as General Maurice Rose until she and her sister United States Army transports were transferred to the U.S. Navy on 1 March 1950 to serve in the recently established Military Sea Transportation Service.
Transferred to the US Navy
She was given the classification T-AP-126 at that time. Manned by a civilian crew, General Maurice Rose operated out of New York in the Atlantic and the Mediterranean during the next 15 years.
Transporting soldiers and refugees
Steaming primarily between New York and Bremerhaven, Germany, she completed more than 150 round-trip voyages while carrying military dependents and European refugees and rotating combat-ready troops. In addition, the ship deployed to the Mediterranean 17 times to support U.S. 6th Fleet operations. Following the Hungarian revolution in October 1956, she completed three runs to Bremerhaven and back between 12 January and 27 March 1957 transporting Hungarian refugees to the United States. On three occasions between 1 April and 5 October, General Maurice Rose was dispatched to the eastern Mediterranean to support units of the U.S. 6th Fleet responding to political crises in Jordan.
The ship was still transporting troops between New York and Bremerhaven in June 1959.
Vietnam operations
In 1965, however, America's increased involvement in the war in South Vietnam beckoned the transport toward a new theater of operations. After completing nine voyages to Bremerhaven and back between 16 January and 4 August 1965, General Maurice Rose departed New York on 14 August for transport duty to Southeast Asia. She sailed via Long Beach, and Pearl Harbor to Qui Nhon, South Vietnam, where she arrived on 14 September and began debarking troops and supplies. After departing Vietnam on the 19th, she steamed via Okinawa and the West Coast of the United States and reached New York on 18 October.
During the first eight months of 1966, she made eight round-trip runs to Europe and back. On 8 September, she again departed New York for troop lift duty to South Vietnam. She operated in the western Pacific supporting US forces in Southeast Asia through the end of 1966. She returned to New York late in January 1967 for an overhaul and was placed in ready reserve status. As such she was laid up at the Cavin Point Army Depot in New York harbor.