Upon returning to Little Creek on 1 April 1957, she operated from there until 2 May 1957, when she was deployed to the Mediterranean Sea for a tour of duty with the United States Sixth Fleet.

Following some four months of operations on the United States West Coast, she sailed for the Western Pacific (WestPac) on 6 June 1958, touched at Pearl Harbor, Hawaii, and arrived in Yokosuka, Japan, for a six-month deployment.

Following a two-month overhaul, Windham County returned to San Diego and spent the late winter and early spring of 1960 in intensive refresher training.

They then visited Singapore and Hong Kong before returning to Yokosuka on 20 December I960, where Windham County spent the rest of the year.

On 4 January 1961, Windham County stood out to sea to carry Marine Corps troops from Iwakuni, Japan, to Naval Air Station Cubi Point, the Philippines.

She then participated in Southeast Asia Treaty Organization (SEATO) Operation Pony Express on North Borneo in Indonesia.

Shortly thereafter, she took part in SEATO Operation Tunlungan at Mindoro, the Philippines, and then reembarked participating troops for transport to Naha and Iwakuni, Japan.

On 3 January 1963, Windham County got underway for Hong Kong, where she served as a station ship and did much to promote the People-to-People Program.

Late in January 1964 she returned to Yokosuka for upkeep and left on 26 February 1964 to take part in Operation Backpack, a joint American-Taiwanese practice amphibious assault which took place at Che Cheng, Taiwan.

She returned to Yokosuka on 26 March 1964 and, from April until June 1964, conducted lifts and training exercises which took her to Taiwan; Iwakuni, Japan; Okinawa; and Hong Kong.

While these exercises were still in progress, the Gulf of Tonkin Incident occurred in early August 1964, resulting in a rapid buildup of American forces in South Vietnam and in nearby waters.

Windham, County departed Yokosuka on 23 June 1965 and participated in various lift operations between Okinawa and South Vietnam.

Leaving the shipyard on 12 October 1965, Windham County was engaged in personnel- and cargo-carrying missions along the coast of South Vietnam before returning to Yokosuka on 10 December 1965 for upkeep.

Windham County departed on 6 January 1966 for Naha, Okinawa, and carried out numerous shuttles along the South Vietnamese coast.

Refresher training occupied January 1967, and Windham County sailed on 15 February 1967 for almost two months of operations off the coast of South Vietnam.

She returned to Yokosuka on 24 April 1967 but, after a month of upkeep, got underway again on 26 May 1967 to resume transport duties off South Vietnam.

She stopped briefly at Naha en route and also was diverted from her planned course to evade Typhoon Emma but finally reached Danang on 9 November 1967.

During the remainder of her deployment to South Vietnam, she spent most of her time carrying troops, equipment, and mail to support operations ashore.

On 6 June 1968, Windham County left Yokosuka to return, via Okinawa, to South Vietnam to serve as a support ship for Task Group (TG) 117.2 in the Mekong Delta.

She sailed on 13 April 1970 for South Korea to take part in Operation Golden Dragon, a joint American-South Korean amphibious exercise.

Windham County remained in the combat zone for the rest of 1970 and through 23 February 1971, when she was relieved and returned to Yokosuka, arriving on 12 March 1971.

From then through 29 July 1971, Windham County was involved in routine shuttles between Okinawa, Numazu, Subic Bay, and Yokosuka.

Windham County departed Yokosuka in early February 1972 to resume her shuttle operations between Japan, Okinawa, and South Vietnam.

The battle stars were for: After Windham County returned to Yokosuka in December 1972, an intensive period of preparation for her transfer to the Turkish Navy under the Security Assistance Program began.