January 1955 the destroyer embarked upon another assignment with the 7th Fleet in the western Pacific. During that assignment, she supported the evacuation of Nationalist Chinese from the Tachen Islands then under pressure from communist forces on the nearby mainland. Before completing that deployment, Ammen also served on the Taiwan Strait patrol. After her return to San Diego on 19 June 1955, the warship took up normal 1st Fleet operations, conducting type training and participating in fleet exercises in the eastern Pacific. That employment occupied her through January 1956. On 7 February of that year, Ammen left San Diego again on her way to the Far East. That deployment lasted until late July when she headed back to the west coast of the United States. The destroyer reached San Diego on 11 August and, on the 30th, began a three-month overhaul at the Mare Island Naval Shipyard near San Francisco. She returned to San Diego and to active service on 7 December. On 16 April 1957, Ammen stood out of San Diego bound for another tour of duty with the 7th Fleet in the Far East. En route, she took quite a detour, steaming via Suva in the Fiji Islands to Melbourne, Australia, to participate in the celebration of the 15th anniversary of the Allied victory in the Battle of the Coral Sea. After the commemoration, Ammen headed north via Manus in the Admiralty Islands and Guam to Yokosuka where she arrived on 1 June. A little less than four months later she concluded her assignment with the 7th Fleet and stood out of Yokosuka on 29 September to return to the United States. Ammen arrived back in San Diego on 14 October and, after post-deployment stand down, resumed normal 1st Fleet operations along the California coast. She remained so occupied until late June 1958. On the 25th, the destroyer got underway again for the western Pacific. She arrived in Yokosuka on 13 July to begin five months of duty with the 7th Fleet. In a deployment plagued by engineering casualties, Ammen still managed extended service at sea with the fast carriers of TF 77 and on the Taiwan Strait patrol. On 6 December, she departed Yokosuka to return to San Diego. Ammen steamed into San Diego on 18 December and remained there exactly 10 weeks completing the usual post-deployment and holiday leave and upkeep period and preparing for regular