World: In Search of an Elusive Foe

WITH unexpected rapidity, U.S. and South Vietnamese forces opened new fronts along the Cambodian border last week. Initially, the drive against the Communist sanctuaries involved 20,000 allied troops operating in two areas, the Parrot's Beak and Fishhook havens northwest of Saigon. By week's end, as half a dozen new task forces were hurled into the border war, the sweeps had spread south as far as the Mekong River and north to the highlands near the Laotian border. What started as a two-front foray was now a campaign engaging 40,000 troops along 600 miles of the frontier (see map).

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