USS Lyman K. Swenson (DD-729) was named for Captain Lyman K. Swenson, who commanded the cruiser Juneau when she was lost in November 1942. She was built by Bath Iron Works, launched on 12 February 1944 and commissioned at Boston on 2 May 1944. She left Boston on 31 July, reached Pearl Harbor on 30 August and Ulithi on 13 October 1944.
She screened a replenishment group of oilers while the Battle of Leyte Gulf was fought, then carriers of Task Group 38.4. On 30 October, off Leyte, she saw her first hostile action when Franklin and Belleau Wood were hit. She screened carriers through the Luzon strikes and rode out the typhoon of December 1944, in which three destroyers capsized. In January 1945 she steamed with Task Group 38.1 on a 3,800-mile raid on Formosa, Luzon and the coasts of Indochina and China.
In the Okinawa campaign she shot down her first plane, a P1Y 'Frances', on 18 March 1945 and her second on 27 March, and shelled Okino Daito Shima in March and Minami Daito Jima in April and June. In July she took part in an anti-shipping sweep into Sagami Wan on the night of 22 and 23 July and remained in Japanese waters until after the surrender on 2 September 1945.
Sources: Dictionary of American Naval Fighting Ships (DANFS) as reproduced on Wikipedia, NavSource Online (commanding officer list), and Wikimedia Commons (photograph record).