 To disrupt the VC's resting period, General Hay launched Operation Shenandoah II to clear a section of Highway 13 which stretched from Chơn Thành to Lộc Ninh.Starting from 28 September, elements of the 1st Infantry Division were air-lifted into positions around Long Nguyen, but again only few contacts were made with the VC.However, on 16 October, the 2nd Battalion, 28th Infantry Regiment found a major VC bunker system located south of their night defensive position near the Ong Thanh Stream, and a short fire fight broke out.