The History Channel: Viet Cong

Using the legendary 10-day battle known as Hamburger Hill as its centerpiece, this History Channel documentary discloses the techniques behind the brand of jungle warfare perfected by the North Vietnamese army, or Viet Cong. Their ingenious attacks, planned from a network of underground tunnels, proved a formidable match for U.S. troops, whose commanders came to realize that their outdated tactics were poorly suited for this kind of warfare.