During this time the AATTV had continued to operate in support of the South Vietnamese forces, with an area of operations stretching from the far south to the Vietnamese Demilitarized Zone (DMZ) forming the border between North Vietnam and South Vietnam. Members of the team were involved in many combat operations, often commanding formations of Vietnamese soldiers. Some advisors worked with regular ARVN units and formations, while others worked with the Montagnard hill tribes in conjunction with US Special Forces. A few were involved in the controversial Phoenix Program run by the US Central Intelligence Agency (CIA), which was designed to target the Viet Cong infrastructure through infiltration, arrest and assassination. The AATTV became Australia's most decorated unit of the war, including all four Victoria Crosses awarded during the conflict.