U.S. Navy Seawolves Helicopter Attack Squadron HA(L)-3

By Friedrich Seiltgen • Published September 26, 2026

In 1965, as the war in Vietnam continued to escalate, the U.S. Navy began joint operations in the south to stop the flow of supplies and interrupt communications to the Viet Cong via the Mekong Delta.

HAL-3 UH-1 gunship flies low in front of a column of PBRs in the Mekong Delta in April 1968 — A HA(L)-3 UH-1 gunship flies low in front of a column of PBRs in the Mekong Delta in April 1968. Known as the “Seawolves,” they provided close fire support to Navy river boats, SEALs, Army troops, and South Vietnamese forces. Image: U.S. Navy

The U.S. Navy began operating riverine forces throughout the Delta and launched Operation Game Warden in December 1965, establishing Task Force 116. This task force combined U.S. Army helicopter crews for air support of U.S. Navy amphibious vessels and armed river patrol boats (PBRs), collectively known as the “Brown Water Navy.” The task force’s mission was “denying the enemy the use of the major rivers of the Delta and the Rung Sat Special Zone.”

US Navy inshore undersea warfare PBR patrols Vung Tag Harbor during Operation Game Warden — A U.S. Navy river patrol boat patrols Vũng Tàu Port during Operation Game Warden. Image: U.S. Navy

Task Force 116 was assigned 120 PBRs, 20 landing craft, personnel, large, one amphibious transport dock, one LST, and eight UH-1B helicopters. The Army’s 197th Aviation Company provided the Hueys, aircrews, and maintenance support, and the first coordinated PBR-Huey mission was conducted on April 10, 1966.

USS Garrett County LST-786 providing support for patrol river boats and UH-1B attack helicopters — The USS Garrett County (LST-786) in the Co Chien River, Mekong Delta, South Vietnam, provides support for patrol boats and UH-1B Helicopters during Operation Game Warden. Image: U.S. Navy

Due to differences in operating methods and terminology between the two services, the U.S. Navy sought control over air operations in the Delta.

Birth of the Navy Helicopter Gunship

In 1966, Rear Admiral Norvell G. Ward, Commander of Naval Forces Vietnam, presented General William C. Westmoreland, Commander of the U.S. Military Assistance Command Vietnam, with a game-changing proposal: providing air support for his riverine forces.

UH-1B Iroquois Helo from Helo Light Squadron Three flies over the Mekong Delta on a strike mission — A UH-1B Iroquois attack helicopter from Helicopter Attack Squadron (Light) 3 flies over the Mekong Delta on a strike mission. Image: U.S. Navy

At the time, Army helicopters had been performing those missions. Still, Admiral Ward proposed providing Navy air crews if the Army provided helicopter gunships, which were not part of the Navy’s aircraft inventory.

Helicopter Combat Support Squadron-1

Beginning in 1966, the Navy began soliciting volunteers to form Helicopter Combat Support Squadron ONE (HC-1), which was subsequently established. Detachments of helicopter gunships were then transferred to the Navy to conduct operations in the Mekong Delta.

US Navy UH-1B helicopter takes off from the USS Harnett County LST-821 for a strike mission against the Viet Cong — A U.S. Navy UH-1B helicopter takes off from the USS Harnett County (LST-821) for a strike mission against the Viet Cong in September 1969. Image: U.S. Navy

HC-1 operated detachments of Army UH-1 gunships providing a quick reaction, close air support (CAS) role for units of PBRs and Swift Boats of the Brown-water Navy. The effectiveness of the helicopter attack squadron was quickly realized.

Vietcong camp is hit by machine gun and rocket fire from two HAL-3 UH-1B helicopters — A Viet Cong camp is hit by machine gun and rocket fire from two HA(L)-3 UH-1B helicopters. Image: U.S. Navy

As the gunship role expanded, the Navy wanted direct control of air operations to support its river patrols. The Army withdrew from the joint operation and transferred eight UH-1B Huey gunships to the Navy in 1966, extending its allocation to 22 by the end of 1967.

Helicopter Attack Squadron (Light) 3

As HC-1 detachments expanded in number, so did the types of missions they undertook, including support of PBRs, landing craft escort, SAR, reconnaissance, SEAL support, and medevac. Following the success of the HC-1 detachments, the Navy established a full squadron on April 1, 1967, at Vũng Tàu, South Vietnam.

Bell UH-1 Helicopter Gunship of Helicopter Attack Light Squadron Three Detachment Three fires a 2.75-inch rocket in support of two river patrol boats — A Bell UH-1 helicopter gunship of Helicopter Attack Squadron (Light) Three fires a 2.75-inch rocket in support of two river patrol boats on the Cổ Chiên River. Image: U.S. Navy

HC-1 was divided into four units: Helicopter Sea Combat Squadron 3, Helicopter Combat Support Squadron 5, Helicopter Combat Support Squadron 7 (Search and Rescue), and Helicopter Attack Squadron (Light) 3, named the Seawolves. Their unit insignia was created using the Lowenbrau Lion logo with an added trident and shield.

UH-1B circles over canal in Mekong Delta while supporting a patrol boat — Squirt I, a UH-1B attack helicopter, circles over a canal in the Mekong Delta while supporting a patrol boat. Image: U.S. Navy

Follow-on HAL-3 pilots and crews completed training at Fort Benning, Georgia, and Fort Bragg, North Carolina. Initially, the squadron fell under the command of TF 116 and, over time, also began supporting Army-Navy Mobile Riverine Task Force (TF-117).

Navy Armed Gunship Helicopter banks in for a low reconnaissance run over a suspected Vietcong staging area in the Mekong Delta of South Vietnam — A U.S. Navy gunship of HA(L)-3 banks during a low altitude reconnaissance run over a suspected Viet Cong staging area in the Mekong Delta of South Vietnam. Image: U.S. Navy

HA(L)-3 evolved into nine detachments, scattered throughout the Mekong Delta. These were located at five airfields, three LSTs with one extra rotated for maintenance, and a Mobile Advance Tactical Support Base called “Sea Float.”

UH-1 Iroquois helicopter from Light Attack Squadron Three flies over an abandoned Viet Cong village on the Cualon River — A UH-1 Iroquois helicopter from Helicopter Attack Squadron (Light) Three flies over an abandoned Viet Cong village on the Cửa Lớn River. Image: U.S. Navy

A typical detachment consisted of two helicopters, a lieutenant commander serving as the officer in command, along with seven additional pilots, eight door gunners, and maintenance personnel.

US Navy UH-1 attack helicopter crewmen respond to a call for combat air support over the Mekong Delta — U.S. Navy UH-1 attack helicopter crewmen respond to a call for combat air support over the Mekong Delta during the Vietnam War. Image: U.S. Navy

As a quick reaction force, they manned two-gunship formations operating 24-hour shifts, ready to respond to call-outs within a 50-mile radius regardless of weather conditions. When the alert horn sounded, the command “Scramble the Seawolves” blared from the loudspeaker. The gunships were airborne within three minutes and engaging the enemy within 15.

The gunships of the Seawolves were the logical solution for the close air support mission (CAS). Fixed-wing aircraft used for CAS were sparse and needed in other areas, and the only runways in the area were located at Vung Tau and Binh Thuy.

Mission Types

The Seawolves performed a variety of missions. This included close air support; tactical reconnaissance; search-and-rescue operations; and the insertion/extraction of SEAL teams from 1968 to 1971, during Operation SEALORD, using eight “Slick” models of UH-1s.

The Bell UH-1 Iroquois

Making its first flight in the late 1950s, the UH-1 Iroquois, also known as the “Huey,” was developed for the U.S. Army as a utility and medical evacuation helicopter, and was the first turbine-powered helicopter to serve in the U.S. Military.

US Navy UH-1B patrols southwest of Saigon — A U.S. Navy UH-1B helicopter patrols southwest of Saigon, Republic of Vietnam, in November 1967. Image: U.S. Navy

The U.S. Army had been using its Huey gunships quite effectively, and the U.S. Navy needed the identical versions for the Seawolves.

US Navy crewmen load the M60 machine gun on a UH-1B helicopter — Crewmen of HA(L)-3 load the M60 machine guns on a UH-1B attack helicopter. Also visible is the 2.75-inch rocket pod on the lower left. Image: U.S. Navy

The gunships had pilot-fired weapons, as well as door gunners, and their armament systems varied throughout the mission. The Seawolves gunships were equipped with grenade launchers, both automatic and handheld, M60 machine guns, M2 .50-caliber machine guns, miniguns with an adjustable rate of fire between 2,000 and 4,000 rounds per minute, and rocket pods armed with flechettes or white phosphorus warheads which were used to mark targets, start fires, or inflict mayhem, were fielded, with many of the weapon systems being designed and modified in the field by gunners and crew chiefs for specific missions.

Standing Down

As the war in Vietnam raged on, U.S. strategists were continuously transferring more responsibility to South Vietnamese troops as part of the Vietnamization program. In March 1972, after five years of combat operations, HAL-3 was disestablished at Binh Thuy.

The Legacy

The Seawolves were the only rapid response helicopter squadron ever commissioned in the U.S. Navy, the only squadron to be established and disestablished outside the United States, and the only squadron to never have a base inside the United States.

Presidential Unit Citation for Helicopter Attack Light Squadron Three — U.S. Navy Helicopter Attack (Light) Squadron Three was awarded the Presidential Unit Citation by President Richard Nixon. Image: U.S. Navy

At the height of the Seawolves’ mission, HA(L)-3 deployed 29 UH-1 Huey gunships, amassing a war record of 78,000 combat missions flown, with a total of 131,000 flight hours, 8,200 enemy killed, 9,500 enemy structures destroyed, and 8,700 enemy vessels destroyed.

Starting with helicopter hand-me-downs, HA(L)-3 went on to become the Navy’s most decorated unit, with 17,339 decorations or medals awarded, with casualties of 44 men killed and over 200 wounded.

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