 Task Force South consisted of the 4th Armor Brigade and the 4th Ranger Group.It departed Hà Tiên on Route 16 along the coast and was to continue west to Route 4, then north then northeast to link up with Task Force North as it moved southwest.Air support was the responsibility of the Republic of Vietnam Air Force 4th Air Division at Binh Thuy Air Base, whose assets were supplemented by US air units, reconnaissance, tactical strike aircraft and B-52s.