When it is disturbed by returning Reds, it gets into the respiratory system and causes nausea and painful burns. Even without CS, tunnel life is grim for the Viet Cong. A diary captured in a ...

The Viet Cong dug elaborate tunnel complexes to use as safe bases, conducted hit-and-run attacks on Americans, and tried to avoid large-scale battles. The GIs usually moved slowly, calling in ...

B-52s have begun making tandem runs over Viet Cong tunnel areas, first with deep-penetration bombs that bore into the earth, then with a second wave of conventional bombs that destroy the surfaced ...