On 10 April 1965 Task Force Alpha of 2nd Battalion, 3rd Marines was landed by helicopter from Da Nang Air Base to secure the area.

In June or July 1968, U.S. Special Forces established Forward Operating Base 1 (FOB 1) at Phu Bai.

[10] The 45th Engineer Group moved north to the Phu Bai area in February 1968, where it assumed general construction support missions for the I Corps Tactical Zone.

[11] In 1969, the 85th Evacuation Hospital moved from Qui Nhơn and was established at the northwest end of the airfield, adjacent to Highway 1.

[1] In late 1969, the 101st Administration Company (101st Airborne Division) was moved from Bien Hoa Base Camp to Phu Bai.

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