United States Navy — Submarine

USS Jallao — service history

This is the full service history. For the vessel's particulars, photograph and specifications, see the entry.

In the words of the US Navy. The account below is reproduced verbatim from the Dictionary of American Naval Fighting Ships, compiled by the Naval History and Heritage Command — a work of the United States Government, in the public domain, and the only text on this site not written here.

Contents

Second World War 1939–1945
1943 1
1944 Cape Enga 2
1945 3
Korean War period 1950–1953
1953 1
Cold War 1954–1963
1955 1
1957 1
1960 1
Vietnam War period 1964–1975
1965 1
1974 1
References 14

Periods, years and the actions beside them are read out of the text — the source is one continuous narrative with no divisions of its own. A period is the calendar, not a claim: a vessel with a 1951 section was not necessarily off Korea.

Second World War 1939–1945

1943

Jallao (SS-368) was laid down on 29 September 1943 at Manitowoc, Wisc., by Manitowoc Shipbuilding Co.; launched on 12 March 1944; sponsored by Mrs. Oliver G. Kirk; and commissioned on 8 July 1944, Lt. Cmdr. Joseph B. Icenhower in command.

1944 Cape Enga

After spending most of July in training, Jallao departed Manitowoc on 26 July 1944 for Chicago, Ill., where she entered a floating dry dock for the trip down the Mississippi River to New Orleans, La. She subsequently departed New Orleans on 6 August, and, after transiting the Panama Canal, ultimately arrived at Pearl Harbor on 22 September.

Following additional training, the submarine sailed on 9 October 1944 for her first war patrol, operating with Pintado (SS-387) and Atule (SS-403) in a coordinated attack group known as “Clarey’s Crushers.” At first, the boats proceeded toward Luzon Strait, but, during the Battle for Leyte Gulf late in October, they received orders to take up scouting positions between the Philippines and Japan to cut off any crippled Japanese warships struggling home after their defeat at the Battle of Cape Engaño. On the evening of 25 October, Jallao came across the damaged light cruiser Tama and moved in to attack. She fired seven torpedoes, of which three hit and sent the Japanese warship to the bottom. After this notable success on her maiden patrol, Jallao continued her search until 28 November, returning to Majuro 10 December.

1945

Jallao sailed for the Yellow Sea for her second war patrol on 6 January 1945. While the decimated Japanese merchant marine offered few targets, she flushed out a convoy on 5 March. During the attack, she had a close call when an enemy escort trying to ram her, damaging her periscope. Two days later, she sailed for Midway, arriving there on 26 March.

After repairs, the submarine departed Midway on 20 April 1945 for her third war patrol, and was assigned aircraft lifeguard duty off Marcus Island. Responding to reports of flyers in the water north of the island 9 May, Jallao braved shore batteries to move in and pick up five men in a raft, delivering them safely to Saipan on 12 May 1945. She then departed for the coast of Japan and more lifeguard duty as U.S. heavy bombers stepped up their attacks on the home islands. She arrived at Pearl Harbor on 13 June 1945.

After advanced training in the Marianas, Jallao departed Guam on 31 July 1945 to patrol the Sea of Japan. On that, her fourth patrol, the submarine sank the 6,000-ton freighter Timoko Maru on 11 August. Four days later, hostilities ended and the boat sailed, via Guam, to San Francisco, where she arrived on 28 September. She was decommissioned at Mare Island Naval Shipyard, Vallejo, Calif., on 30 September 1946, after which she entered the Pacific Reserve Fleet.

Korean War period 1950–1953

1953

Jallao ’s home port was changed to New London in July 1953 and she underwent a conversion in which she was streamlined and equipped with snorkeling gear and new electric equipment. She was recommissioned on 4 December 1953, Lt. Cmdr. J. W. Mercer in command. After shakedown in the San Diego area, the submarine departed on 12 April for the East Coast, steaming via the Panama Canal to Norfolk. Joining Submarine Squadron 6, Jallao operated out of Halifax during 1954, training with Canadian and U.S. antisubmarine units. In January and February 1955, she took part in fleet exercises in the Caribbean, returning to Norfolk on 4 March.

Cold War 1954–1963

1955

Jallao ’s home port was changed to New London in July 1955, and she got underway with British submarine HMS Alderney on 7 August to take part in Joint Exercise New Broom IV . Following this operation, Jallao was deployed to the Sixth Fleet and departed for the Mediterranean on 9 November. In the months that followed, she helped train Italian Navy ships and took part in fleet exercises, beginning the long voyage home in mid-January 1956. The ship proceeded through the Suez Canal, visited several countries of eastern and southern Africa, and crossed the South Atlantic to take part in exercises with Uruguayan and Brazilian destroyers. The veteran submarine returned to New London on 16 April.

1957

After having installed the latest in electronic gear, Jallao resumed operations in January 1957. Combined fleet exercises in the Caribbean occupied her through February, and, after coastal antisubmarine operations, she arrived at Boston late in July for a short midshipman training cruise. She spent September and October in the North Atlantic on a North Atlantic Treaty Organization (NATO) evolution before she returned to New London on 24 October.

1960

Jallao spent most of 1958 on training exercises off the Atlantic Coast, taking part in a combined antisubmarine exercise in the North Atlantic in September. She spent the year 1959 largely in the development of equipment and training with the Submarine School at New London. The ship got underway on 20 January 1960 for exercises in the Caribbean, returning on 19 February. The latter part of the year was spent in training out of Bermuda. From 9 January to 24 March 1961, the submarine carried out special training off Scotland, and operated with Canadian ships off Halifax that summer, before she spent the remainder of the year in the waters off New London.

Vietnam War period 1964–1975

1965

Jallao began 1962 with her second Mediterranean cruise, sailing on 2 January, and exercised with the Sixth Fleet until 7 May. She spent the last four months of the year being extensively modernized and undergoing repairs at the Philadelphia [Pa.] Naval Shipyard. Through 1963 and 1964, the ship took part in training cruises to the Caribbean, served in submarine school training, and participated in equipment evaluation work. On 3 January 1965, she departed for a four-month Sixth Fleet deployment, returning on 1 May for submarine warfare tactics and submarine school operations out of New London. Jallao operated along the Atlantic coast and in the Caribbean into 1967.

1974

Ultimately, Jallao was transferred to the government of Spain through the Security Assistance Program (SAP) on 1 June 1974, and she was stricken from the Naval Vessel Register on 26 June 1974.

Other photographs

Held for this vessel, and not tied to any part of the account above.

330-PS-7734 (USN 686484): USS Jallao’s (SS 368) Commanding Officer, Lieutenant Commander John W. Chapman, USN, points out objects of interest in the interior of the submarine to Governor Mohamed Raid of Port Said, Egypt, and the Suez Canal, January 28, 1956. Extended caption: USS Jallao (SS-368) began a three-month 18,000 mile goodwill cruise home from the Mediterranean, January 20th, after comple Unknown author — National Museum of the U.S. Navy — Public domain — Wikimedia Commons

References

Every work this entry draws on. There are no numbered markers in the text above: what we hold is the provenance of the page — this history, this article, these photographs.

History Jallao (SS-368) Dictionary of American Naval Fighting Ships, Naval History and Heritage Command. A work of the United States Government, in the public domain — the only text on this site reproduced verbatim.
Facts USS Jallao Structured facts only — dates, dimensions, armament and fate. No wording is taken from it. Harvested 1 August 2026.
Photograph USS Jallao;0836808 Unknown author — Unknown source — Public domain — Wikimedia Commons
Photograph 330-ps-7734-usn-686484 16555671766 o Unknown author — National Museum of the U.S. Navy — Public domain — Wikimedia Commons
Photograph 330-ps-7734-usn-686485 16580962992 o Unknown author — National Museum of the U.S. Navy — Public domain — Wikimedia Commons
Photograph 330-ps-7734-usn-686486 15961885073 o Unknown author — National Museum of the U.S. Navy — Public domain — Wikimedia Commons
Photograph 330-ps-7734-usn-686487 15959505274 o Unknown author — National Museum of the U.S. Navy — Public domain — Wikimedia Commons
Photograph 330-ps-7734-usn-686488 16395788749 o Unknown author — National Museum of the U.S. Navy — Public domain — Wikimedia Commons
Photograph 330-ps-7734-usn-686489 16555657046 o Unknown author — National Museum of the U.S. Navy — Public domain — Wikimedia Commons
Photograph 330-ps-7734-usn-686490 15959497044 o Unknown author — National Museum of the U.S. Navy — Public domain — Wikimedia Commons
Photograph 330-ps-7734-usn-686491 15961862093 o Unknown author — National Museum of the U.S. Navy — Public domain — Wikimedia Commons
Photograph 330-ps-7758-usn-687347 15961847563 o Unknown author — National Museum of the U.S. Navy — Public domain — Wikimedia Commons
Photograph 330-ps-7758-usn-687348 16580395831 o Unknown author — National Museum of the U.S. Navy — Public domain — Wikimedia Commons
Photograph 330-ps-7758-usn-687349 15961844853 o Unknown author — National Museum of the U.S. Navy — Public domain — Wikimedia Commons