in South Vietnam and taking the first steps toward bringing the war to the enemy. The compelling story by George L. MacGarrigle begins in October 1966, when General William C. Westmoreland believed that he had the arms and men to take the initiative from the enemy and that significant progress would be made on all fronts over the next twelve months. Aware of American intentions, North Vietnam undertook a prolonged war of attrition and stepped up the infiltration of its own troops into the South. While the insurgency in the South remained the cornerstone of Communist strategy, it was increasingly overshadowed by main-force military operations. These circumstances, according to MacGarrigle, set the stage for intensified combat. The North Vietnamese and Viet Cong units retained the advantage, fighting only when it suited their purposes and retreating with impunity into inviolate sanctuaries in Laos and Cambodia.