During the Vietnam War era, the corps supervised the training and deployment of more than 137 units and detachments to Southeast Asia, including the I and II Field Force staffs. The corps also trained more than 40,000 individual replacements for units in Vietnam, for a total of over 100,000 soldiers trained. As the war in Southeast Asia ended, the corps received many units and individual soldiers for reassignment or inactivation. It was also during this period that III Corps units participated in a number of key tests and evaluations that would help determine Army organization and equipment for the next 30 years. During this era, the corps also received its distinctive unit insignia.