USS Halligan (DD-584) was a of the United States Navy, named for Rear Admiral John Halligan, Jr. (1876–1934). Halligan was laid down 9 November 1942 by Boston Navy Yard, Boston, Massachusetts; launched 19 March 1943, sponsored by Mrs. John Halligan, widow of Admiral Halligan, and commissioned 19 August 1943. World War II After shakedown off Bermuda Halligan in mid-November joined carrying President Franklin D. Roosevelt and his party en route to the historic Teheran Conference. She served as part of the escort screen to Casablanca, then for the next few weeks conducted anti-submarine operations off North Africa. She rejoined Iowa 11 December and steamed to the United States, arriving Charleston, South Carolina, 17 December. 1944 Assigned to duty in the Pacific, Halligan departed Charleston 21 December, reached San Diego, California, 4 January 1944, and arrived Pearl Harbor 11 January. As part of Task Force 52 (TF 52), she sailed 22 January for the invasion of the Marshall Islands. Between 31 January and 25 February she operated as a screen and patrol ship during the Kwajalein operations, and she screened and patrolled in the forward area until returning to Pearl Harbor 22 May. Halligan next joined the screening group for escort carriers and , carrying Army fighters for support of the Saipan operation. After launching planes 22 June, the task group was attacked the next day by Japanese dive bombers. After a period at Pearl Harbor, Halligan departed 15 September for Eniwetok and Manus, Admiralties. Arriving Seeadler Harbor 3 October, she joined a task force forming for the invasion of the Philippines. Departing 14 October, she entered Leyte Gulf 20 October and was soon in the thick of the fighting as Japanese planes tried unsuccessfully to dislodge the landing forces. While guarding the transports, she survived almost continuous air attacks; at one point two bombs passed between her stacks and struck the water without exploding. On 25 October she shot down at least two attacking aircraft, one a two-engined bomber. Later that same day, she departed Leyte to screen the battered escort carriers of "Taffy 3", withdrawing from their courageous battle against Japanese forces off Samar. She joined the carriers 26 October and steamed to Manus, Admiralties, arriving 1 November. While at Manus, she supported rescue operations following the explosion of 10 November. Two days later she sailed for Leyte, and she finished the year screening for escort carriers between Leyte