Provide utility combat helicopter support to the landing force in the ship to shore movement and in subsequent operations ashore.

The squadron conducted over water search and recovery of instrument capsules, personnel evacuations and ship to shore supply runs.

[4]: 146  On 14 April a squadron UH-34D was shot down on a medevac mission 40 miles (64 km) west of Danang near the Laos border, the crew was rescued and the helicopter was destroyed.

[4]: 149  On 18 April the squadron supported Operation Lam Son 115 an Army of the Republic of Vietnam (ARVN) attack in the A Sầu Valley.

[4]: 149  From 27 April to 25 May the squadron supported Operation Quyet Thang 202 an ARVN attack on the Vietcong (VC) stronghold at Đỗ Xá (15°10′37″N 108°04′41″E / 15.177°N 108.078°E / 15.177; 108.078).

[4]: 154–5  On 13 June a squadron UH-34 on a resupply mission from Khe Sanh to Tiger Tooth Mountain (Dong Voi Mẹp) (16°46′05″N 106°42′47″E / 16.768°N 106.713°E / 16.768; 106.713) was caught in downdrafts and crashed, all crewmen were rescued but the helicopter was destroyed.

On 28 October, most of the squadron's pilots and crews flew to South Vietnam where they began operating UH–34s to help relieve the medium lift shortage caused by the grounding of CH-46s while waiting for their own aircraft to be modified back in California.

On 10 November the aircraft left the United States onboard the USS Valley Forge and 19 days later arrived at Phu Bai Combat Base.

During the deployment, the squadron supported Marine Air Ground Task Force 4-90 in the Republic of the Philippines before, during and after the eruption of Mount Pinatubo and resulting devastation.

Continuing into 1992, the squadron would find themselves on Kauai, for Operation Garden Isle, performing humanitarian relief due to the devastation left by Hurricane Iniki.

[11] In February 1996, the squadron provided executive transport for President Clinton and other dignitaries while they toured flood damaged Portland, Oregon.

The squadron began training to their new core competency of being part of 3rd Marine Aircraft Wing's "Fly In" Echelon for contingency operations.

Squadron aircrews conducted Casualty Evacuation (CASEVAC) missions in direct support of RCT-7 Headquarters for the duration of the war, traveling with the 1st Marine Division from Basra to downtown Baghdad.

With the end of combat operations in Iraq on 17 April, HMM-364 continued to fly CASEVAC and Logistical Support for the Marine Corps humanitarian aid work underway on the behalf of the Iraqi people.