Nation: Raising the Stakes in Indochina

VIET Nam has been called a war without fronts. Yet for five long years, U.S. combat troops were halted time and again by one seemingly impenetrable enemy line: South Viet Nam's twisting 600-mile border with Cambodia. Although it shielded no fewer than five large North Vietnamese and Viet Cong sanctuaries, the U.S. refused to violate Cambodia's neutrality by crossing the border to destroy them. Frustrated American military men, peering across valleys at one or another of the inviolable areas, often wished aloud: "If only they'd...

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