[1][2] During Operation Prairie on 17 August 1966 Company H, 2nd Battalion, 3rd Marines conducted a reconnaissance in force along Route 9 west of Cam Lộ.

The Marines moved forward but came under fire from a People's Army of Vietnam (PAVN) bunker dug into Hill 252.

[4]: 141  In September 1969 as part of Operation Keystone Cardinal the 3rd Marine Division began its withdrawal from Vietnam.

[4]: 165  In late October the Marines had handed over control of their tactical area of operations (including the Khe Gio Bridge) to the 1st Brigade, 5th Infantry Division.

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