Diego with the Pacific Reserve Fleet, Yarnall was finally placed out of commission on 15 January 1947. Korean War The outbreak of the Korean War in June 1950 brought many ships out of the "mothball fleet." Yarnall was ordered back into active service on 31 August 1950, and she was recommissioned at San Diego on 28 February 1951. She reported for duty with the Pacific Fleet on 20 March and conducted shakedown training and other exercises along the west coast until mid-May. On 15 May, Yarnall departed San Diego for Japan. Steaming via Pearl Harbor, she arrived in Yokosuka on 7 June and, three days later, got underway for her first tour of combat duty in Korean waters. For the most part, Yarnall served in the screen of TF 77, the carrier task force, though on occasion she moved close to the coast of Korea to provide gunfire support for the United Nations troops operating ashore. Her first Korean War deployment was punctuated by periodic port calls, mostly at Yokosuka, but also at Okinawa and at Keelung, Taiwan. In August, she served briefly with the Taiwan Strait patrol before returning to the Korean combat zone in September. Her first Korean War deployment lasted until December. On 8 December, the destroyer departed Yokosuka and steamed via Midway and Pearl Harbor to San Diego where she arrived on the 21st. From there, she moved to Long Beach early in 1952 for an overhaul. The warship completed repairs early that summer and returned to San Diego on 11 June. A month and a day later, she departed San Diego; set a course via Pearl Harbor and Midway for the western Pacific; and arrived in Yokosuka on 6 August. On the 8th, she again got underway and, after an overnight stop at Sasebo on 10 and 11 August, headed for the Korean operating area. Again, her duties consisted of screening TF 77 carriers and providing bombardment services, frequently at the besieged port city of Wonsan. As during the previous deployment, she alternated tours of duty in Korean waters with port calls at Japanese ports for repairs, upkeep, rest, and relaxation. Later, in November, she returned to the Taiwan Strait patrol before resuming her tours of duty with TF 77 and on the bombline. On 30 January 1953, she concluded her second Korean War deployment by departing Sasebo for the United States. Steaming via Midway