Viet Cong (VC) forces operated a supply network of footpaths and ox trails parallel to the Đồng Nai river through western Tân Uyên District connecting War Zone D to southern Bình Dương Province.

[1]: 102 Brigadier General Robert C. Forbes planned to deploy the 4th Battalion, 12th Infantry to interdict the supply route and allow the ARVN 48th Regiment to extend security over the densely-populated hamlets along the banks of the Đồng Nai river.

[1] On 4 December, 4/12th Infantry commanded by Lieutenant Colonel William S. Schroeder, began landing several kilometers north of Tân Uyên town.

That afternoon as the force moved through an area of thick vegetation it was ambushed by the D800 Battalion of the Đồng Nai Regiment in concealed bunkers, with more than 12 U.S. soldiers killed or wounded in the initial fire.

It was considered a success because the U.S. forces had kept the VC away from Tân Uyên town and the Đồng Nai river hamlets and prevented rocket attacks on Long Binh.