Throughout 1963 the duties of the U.S. Army Support Group steadily increased, particularly regarding to combat support activities and logistics. During the year, the U.S. buildup continued, especially in aviation, communications, intelligence, special warfare, and logistic units, reaching a total or 17,068 man, or which 10,916 were Army. Because or this expansion, General Stilwell late in 1963 proposed that the name or the support group be changed to U.S. Army Support Command, Vietnam. General Harkins concurred and General Collins and Admiral Fell approved the redesignation. The new designation went into effect on 1 March 1964.