USS John C. Butler

The new destroyer escort conducted shakedown training off Bermuda before departing Hampton Roads on 5 June 1944 for the Pacific. Sailing via the Panama Canal, she arrived Pearl Harbor on 26 June and engaged in convoy and training operations in July. John C. Butler then departed Pearl Harbor on 9 August screening transports bound for the invasion of the Palau Islands. After seeing them safely to Tulagi, the ship operated with escort carriers out of Manus Island on pre-invasion strikes. Two islands wanted as advance bases for the long-awaited move into the Philippines, Morotai and Peleliu, were stormed on 15 September; and John C. Butler provided anti-submarine and anti-aircraft protection for the supporting carriers. Returning to Manus on 30 September, she replenished in preparation for the Leyte operation in October.

The escort vessel sailed with Rear Admiral Ralph A. Ofstie's escort carrier group on 12 October to provide air cover for the massive movement of transports into Leyte Gulf. After the initial landings, the three carrier groups, soon to become famous by their radio code names, "Taffy 1", "Taffy 2", and "Taffy 3", took station east of the Philippines to lend close air support.

The Japanese fleet was closing the Philippines in a last attempt to annihilate the invasion force, with heavy ships designated to break into Leyte Gulf from north and south, and a diversionary fleet of carriers to draw Admiral William F. Halsey's 3rd Fleet off to the North. In the first two actions of the massive Battle of Leyte Gulf which ensued, the Battle of Sibuyan Sea and the Battle of Surigao Strait, the Japanese were badly mauled. But Vice Admiral Takeo Kurita's Center Force still transited San Bernardino Strait the night of 24–25 October, and just after sunrise bore down on the relatively unprotected Taffy 3, including John C. Butler.

The two-hour Battle off Samar which followed has taken a rightful place among the most memorable actions in naval history. The slow escort carriers launched all planes to attack the Japanese cruisers and battleships, and John C. Butler and her sisters laid heavy smoke to confuse enemy batteries. A rain squall provided cover for a turn to the south, and just after 07:30 the destroyers began their gallant torpedo attacks against great odds. Destroyers Johnston, Hoel, and Heermann, and DE Samuel B. Roberts made close-in attacks on cruisers and battleships, forcing them to zig-zag, while aircraft made continuous attacks. Soon after this first attack, John C. Butler turned from the carriers to launch her remaining torpedoes, then exchanged gunfire with a heavy cruiser. The DE continued to fire and dodge heavy-caliber fire until dangerously low on ammunition, then returned to the carrier formation to provide smoke coverage.

Rear Admiral Clifton A. F. Sprague, commander of Taffy 3, later described the next surprising development: "At 0925 my mind was occupied with dodging torpedoes when near the bridge I heard one of the signalmen yell, '... dammit, boys, they're getting away!' I could not believe my eyes, but it looked as if the whole Japanese fleet was indeed retiring.... At best, I had expected to be swimming by this time." The Japanese – damaged and fearing heavier air attack – had indeed reversed course. Though the escort carriers lost one of their number and three escorts, their valiant fight had stopped the Japanese from attacking the transports in Leyte Gulf. However, shortly after the Center Force retreated from the engagement, the first attack of the war from a kamikaze unit fell upon the remaining ships of Taffy 3, sinking a second escort carrier and damaging all but one of the rest.

After rescuing survivors from St. Lo, John C. Butler escorted the surviving carriers of Taffy 3 via Manus to Pearl Harbor, then returned to Manus on 17 December. Departing with escort carriers on 31 December, she protected amphibious transports steaming to the invasion of Luzon. During the voyage through the South China Sea, the ships encountered and drove off determined kamikaze attacks. On the evening of 8 January 1945, John C. Butler and other escorts shot several kamikazes down. She operated off Lingayen Gulf from 9–17 January and screened carriers during massive strikes in support of ground operations. Departing the Luzon coast, she arrived at Ulithi on 23 January to prepare for the next important amphibious landing — Iwo Jima.

The veteran DE took part in rehearsals in the Marianas, and arrived off Iwo Jima on 19 February with an escort carrier group. She again fought off a severe air attack on 21 February. She remained on duty off Iwo Jima until 9 March, when she sailed for Ulithi, having helped to win another important island air base for the eventual attack on Japan.

Okinawa was to be the site of the last and largest of the Pacific amphibious assaults. John C. Butler sailed on 26 March with transports; and, as the troops stormed ashore on 1 April, she resumed her now-familiar screening duties with carrier groups. As the Japanese launched fruitless suicide attacks, the ship escorted carriers into Kerama Retto, rescued downed pilots, and ferried men and material. Transferred to dangerous outer picket duty north of Ie Shima on 20 May, she was attacked by six kamikazes just before sunset. Skillful gunnery accounted for five of the attackers, and John C. Butler sustained damage only to her mast and antennas. She sailed on 27 May for repairs in the Philippines.

The ship returned to Okinawa with a convoy on 4 July, and spent the last month of the long war on convoy duty between that island and the Pacific advance bases. She returned to San Pedro, Los Angeles on 23 November and decommissioned on 26 June 1946, joining the Pacific Reserve Fleet at San Diego, California.

With the outbreak of the Korean War in June 1950, John C. Butler recommissioned on 27 December 1950. Following shakedown, she was assigned to 11th Naval District for the job of training naval reservists on short sea cruises. Thus, she helped maintain trained officers and men to meet the U.S. Navy's cold war commitments. In addition to reserve cruises, she took part in the training program of Fleet Sonar School, San Diego. She decommissioned on 18 December 1957 and re-entered the Reserve Fleet, San Diego. She was eventually sunk as a target in December 1971.