Cambodia: Buildup on the Border

Confronted by persistent allied military pressure, North Vietnamese infiltrators are finding their old southbound routes to be increasingly hazardous traveling. The DMZ and the South China Sea coast have been virtually sealed off, and the Ho Chi Minh Trail's Laotian branch is being steadily pounded from the air. That leaves only Cambodia as a relatively bomb-free route into South Viet Nam. This kind of end run is hardly new to the Communists, who have often used Prince Norodom Sihanouk's neutral kingdom as a gateway and a sanctuary. But the rising intensity of...

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