Mobile Riverine Force in conjunction with the Army of the Republic of Vietnam (ARVN) from 19–21 June 1967 against the Viet Cong (VC).

[1]: 104  The operation plan called for the deployment of five Companies of the 3rd and 4th Battalions, 47th Infantry Regiment into the operations area by assault craft and sweep south towards the ARVN 2nd Battalion, 46th Infantry blocking positions near the town of Ap Bac in Tien Giang Province.

[2]: 37 At 10:00 U.S. intelligence learned that a battalion size VC force was located east of the ARVN blocking position.

By 20:00 darkness and enemy fire stopped the assault with Companies B and C, 3/47th Infantry, still some 600 meters west of the ambush site.

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