The Tunnels of Cu Chi: A Harrowing Account of America's Tunnel Rats in the Underground Battlefields of Vietnam

At the height of the Vietnam conflict, a complex system of secret underground tunnels sprawled from Cu Chi Province to the edge of Saigon. In these burrows, the Viet Cong cached their weapons, tended their wounded, and prepared to strike. They had only one enemy: U.S. soldiers small and wiry enough to maneuver through the guerrillas' narrow domain.

The brave souls who descended into these hellholes were known as “tunnel rats.” Armed with only pistols and K-bar knives, these men inched thei...