South Viet Nam: The Tunnel Rats

To the Viet Cong, a shovel is as important as a rifle. Steadily increasing pressure from American ground and air power has literally pushed the Reds underground, and in the past few years they have carved out a subterranean Viet Nam that is every bit as complex as the surface one. Every city is ringed by miles of intricate tunnels; Red redoubts in the countryside are riddled with sniper-manned "spiderholes," command bunkers, storage vaults, and even underground hospitals with electricity and running water.

Like some breed of superbadgers, the Reds dig round the clock. Even hardcore V.C. troopers often...

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