Battle off Samar: October 1944

Heermann screened transports and landing ships to the beaches of Leyte under the command of recently promoted Commander Amos T. Hathaway, then joined Rear Admiral Thomas L. Sprague's Escort Carrier Group (Task Group 77.4) which was made up of three escort carrier task units, known as the "Three Taffies" because of their voice calls: "Taffy 1", "Taffy 2", and "Taffy 3". Destroyers Hoel and Johnston joined her in screening Rear Admiral Clifton Sprague's unit, "Taffy 3" which also included his flagship Fanshaw Bay and five other escort carriers.^[2]

On 25 October 1944 found the task group east of Samar steaming north as the Northern Air Support Group. At 06:45 lookouts observed anti-aircraft fire to the north and within three minutes, were under heavy fire from Japanese Admiral Takeo Kurita's Center Force of four battleships, six heavy cruisers, two light cruisers, and 11 destroyers. In an effort to withdraw away to the south from Kurita's force, the escorts began to make smoke screens to mask the movement of the larger ships. Heermann, on the opposite side of the carriers from the Japanese force at the opening of the battle, steamed into the action at flank speed through the escort carriers which, after launching their planes, formed a rough circle as they made for Leyte Gulf. Smoke and intermittent rain squalls reduced visibility to less than 100 yards (91 m) which led to near collisions, with Heermann forced to avoid the destroyer escort Samuel B. Roberts and destroyer Hoel.^[2]

As the escorts began torpedo runs at the Japanese force, Heermann began firing her 5-inch guns at one heavy cruiser, Chikuma, while directing torpedoes at Haguro. Heermann then changed course to engage a column of four battleships whose shells began falling around the destroyer. Heermann targeted Kongō, the column's leader, at which the destroyer launched three torpedoes. Then Heermann switched targets to Haruna, and fired three torpedoes, which were launched from only 4,400 yards (4,000 m). The destroyer retreated after believing one of the torpedoes had struck a target. Japanese records claim that the battleship successfully evaded all of the torpedoes from Heermann, but they were slowed in their pursuit of the American carriers. The battleship Yamato was forced out of the action altogether after reversing course when caught between two spreads.^[2]

Heermann laid another smoke screen along the starboard quarter of the carrier formation and then returned to engage the Japanese force of four heavy cruisers. Here the destroyer dueled with Chikuma. A series of 8-inch (203 mm) hits stuck the forward section of the destroyer, flooding it and pulling the bow down so far that the anchors were dragging in the water. One of the 5-inch guns was put out of action but in conjunction with strikes from the carrier aircraft forced Chikuma to withdraw, and the Japanese cruiser sank during her retreat. The heavy cruiser Tone took up Chikuma's battle and engaged Heermann until the destroyer withdrew to lay more smoke. At this point, support from "Taffy 2" arrived to aid the escorts and aircraft attacked Tone forcing the cruiser to withdraw. As more support arrived, the Japanese withdrew.^[2] For his skillful maneuvering and leadership Heermann's Commanding Officer, Commander Amos Hathaway, was awarded the Navy Cross.^[2][3]

Repairs and return to service

Heermann sailed to Kossol Passage for temporary repairs before making for Mare Island and overhaul, which was completed on 15 January 1945. The destroyer was then assigned to fast carrier task forces in the western Pacific. During the Battle of Iwo Jima, Heermann performed radar and anti-submarine picket duty. On 20 March 1945 the destroyer sank a small surface vessel and rescued seven Japanese crew. Seven days later she took part in the night bombardment of Minami Daito Jima. During the Okinawa campaign she took several enemy planes under fire as she guarded carriers. On 18 April in collaboration with destroyers Mertz, McCord, Collett, and Uhlmann and planes from aircraft carrier Bataan, Heermann sank I-56, a carrier of the kaitens—human-guided torpedoes. She continued to support carrier operations off Okinawa until sailing to Leyte Gulf for replenishment and repairs in late June. On 1 July she helped to screen the fast carrier force that devoted the ensuing five weeks to almost continuous air strikes and bombardment.^[2]

On 15 August 1945 Heermann was on radar picket station some 200 miles (320 km) southeast of Tokyo when, several hours after the announcement of the end of hostilities, a kamikaze emerged from a cloud bank and began to dive in Heermann's direction—only to be splashed by the destroyer's gunners in one of the final naval actions of World War II. In the following weeks Heermann operated in the screen of the fast carrier task force providing air cover and air-sea rescue service. The destroyer entered Tokyo Bay on 16 September 1945 and remained in the area to support the occupation forces until 7 October when she sailed for the United States. Heermann was decommissioned at San Diego on 12 June 1946.^[2]

1951–1957

Heermann remained in reserve at San Diego until re-commissioning on 12 September 1951. After training in local waters off California, she departed San Diego on 4 January 1952 for her new base, NS Newport, Rhode Island, where she arrived on 23 January. She spent 1952 training along the eastern coast from New England to the Virginia Capes, followed by ASW and fleet problems during winter months in the Caribbean. The destroyer returned to Newport for operations along the Northeastern seaboard. After a voyage to Plymouth, England, in June and July 1953, she participated in antisubmarine maneuvers between Newport and the Virginia Capes. Heermann departed on a world cruise 3 December 1953. First she sailed for Yokosuka, Japan, by way of the Panama Canal, San Diego, and the Hawaiian Islands. After a two-day replenishment in Yokosuka, she set course for Okinawa where she acted as part of the escort for 3d Marine Division amphibious warfare landings and conducted barrier patrol in support of the exercise. After more maneuvers took her to Korea, Iwo Jima, and the South Coast of Japan, she returned to Yokosuka which she cleared 22 May 1954 to resume her world cruise, calling at Hong Kong and Singapore on her way to the Suez Canal. In the Mediterranean she visited Port Said, Naples, Villefranche, and Barcelona before returning to Newport 17 July 1954.^[2]

For the next year and a half Heermann participated in training exercises along the Atlantic coast. On 1 February she sailed to join the 6th Fleet in exercises along the coast of Lebanon, Israel, and Egypt. In April she was invited by Prince Rainier to be in port for his wedding to Miss Grace Kelly from 19–24 April 1956. Heermann furnished a 40-man honor guard for the occasion. From Monaco she joined the 6th Fleet off Greece, and then departed for Fall River, Massachusetts, where she arrived 28 May 1956. Heermann operated out of Newport until 6 November, when she sailed for the Mediterranean where she proved to be a first-rate antisubmarine ship in joint exercises with the Italian Navy.^[2]

After revisiting Monaco at the invitation of Prince Rainier and Princess Grace, she returned to Fall River 20 February 1957. She served as gunnery school-ship out of Newport until 30 June when she joined Charles J. Badger in the screen of antisubmarine warfare carrier Leyte for two weeks of air operations for the training of Naval Academy midshipmen. She decommissioned at Boston 20 December 1957 and was assigned to the Boston Group of the U.S. Atlantic Reserve Fleet.^[2]

Argentine service

On 10 August 1961, the ship was commissioned into the Argentine Navy.^[4] On 14 August 1961 Heermann was formally transferred on a loan basis to the government of Argentina under terms of the Military Assistance Program. She served in the Argentine Navy under the name Brown (D-20).^[2] The ship was decommissioned in 1982.^[4]