The Long Hải Hills are hills that are located near Long Hải, in Long Điền District, Bà Rịa–Vũng Tàu Province, Vietnam.
During the Vietnam War, the Long Hảis were a Viet Cong base area, known as Minh Dam secret zone. The VC D445 Battalion and VC C25 Company used the hills as a supply and staging area.
References
Long Hải Hills Wikipedia(Text) CC BY-SA