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Much has been written about America's war in Vietnam, and an enduring and troubling subtext is the composition of the body of soldiers that made up the U.S. troop deployment: from the initially well-trained and disciplined group of largely elite units that served in the mid-sixties to what has been termed an "armed mob" by the end of that decade and into the early 1970's. Drug use, insubordination, racial antagonism that often became violent, theft and black market dealing, and even "fragging" (murder of officers and senior noncoms by disgruntled troops) marred the record of the U.S. military....