Reaching Leyte Gulf 21 February, she put to sea with men of the 77th Infantry Division for amphibious training off Leyte before departing San Pedro Bay 21 March to join a convoy for the Okinawa invasion. She arrived off Kerama Retto 26 March. While she landed troops 2 April, her gunners shot down three planes.[3]
Transport duties
Mountrail departed Kerama Retto and arrived San Francisco 22 May, to load troops for the Philippines, whom she disembarked at Manila. Returning San Francisco 5 August, she sailed with more troops, landing them at Batangas, Luzon, 11 September. At Leyte Gulf she took on occupation troops whom she landed at Hakodate, Japan, 4 October. then carried Marines from Japan to Qingdao, China, before sailing for home 5 November.[3]
With the outbreak of the Korean War, Mountrail recommissioned 9 September 1950, and sailed 22 December, for the Far East to carry men between Japan and Korea until returning San Diego 2 August 1951. On 28 May 1952, she sailed for her second tour of duty with the 7th Fleet operating between Hong Kong and Korea for the next 6 months. On 14 October 1952, she joined in the feint off Kojo, Korea, which tricked the Communists completely.[3]
Operation "Passage to Freedom"
Mountrail returned to Long Beach in December and trained on the West Coast until sailing for Japan 28 November 1953. She sailed between the Philippines and Japan until August. when she Joined Operation Passage to Freedom, the massive evacuation of refugees from North to South Vietnam.[3]
USS Mountrail (APA-213), during an underway refueling from USS Waccamaw (AO-109), 1967
Mountrail recommissioned 22 November 1961, and sailed to join Amphibious Squadron 12, US Atlantic Fleet. During training, she operated in the Atlantic and Caribbean, strengthening American forces at Guantánamo Bay during the Cuban Missile Crisis of fall 1962. In October and November 1964 she took part in NATO landing exercises in southern Spain, and 8 February 1965, she left Norfolk, Virginia for her first deployment with the 6th Fleet. She took part in exercises off Norway in June and July, returning Norfolk 20 July.[3]
Into 1969, Mountrail had continued annual deployments with the 6th Fleet, strengthening the amphibious capability of this bulwark of freedom in the Mediterranean.[3]
Final decommissioning
She was decommissioned 13 August 1970, with delivery to the Maritime Administration (MARAD) the same day. Mountrail was laid up in the National Defense Reserve Fleet, James River Group, Lee Hall, Virginia. She was struck from the Navy Vessel Register on 1 December 1976. On 19 September 1984, she was withdrawn from the fleet for stripping, being returned 14 August 1985.[2][4]
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