By early 1966, Viet Cong guerrillas had made substantial gains and were believed to control nearly three-quarters of South Vietnam. But General Westmoreland thought his most urgent task was to destroy the North Vietnamese regular army units Hanoi was sending south. Westmoreland's target was reaching what he called the "crossover point"—the point at which US and ARVN forces were killing more enemy troops than could be replaced.

NOTE: This video is part of a lesson plan titled Trying to Find the Right Formula.