Iron Triangle (Vietnam) Iron Triangle (Vietnam) The Iron Triangle (Vietnamese:"Tam Giác Sắt") was a area in the Bình Dương Province of Vietnam, so named due to it being a stronghold of Viet Minh activity during the war. The region was under control of the Viet Minh throughout the French war in Vietnam and continued to be so throughout the phase of American involvement in the Vietnam War, despite concerted efforts on the part of US and South Vietnamese forces to destabilize the region as a power base for their enemy, the communist North Vietnamese–sponsored and–directed South Vietnamese insurgent movement, the National Liberation Front
Battle of the Iron Triangle Infantry, 5th Division, had been selected to try to capture Base 82, having replaced its sister regiment, the 7th, in the Iron Triangle. Prior to an attack scheduled for 7 September, ARVN reconnaissance patrols had successfully reached the base's perimeter. The 8th Regiment formed a task force around its 1st and 2d Battalions, reinforced by the 5th Division Reconnaissance Company and a small armored troop with 3 M41 tanks, 3 M48 tanks, and 3 M113s. The 1st Battalion advanced south of Route 7, while the 2nd Battalion, with the reconnaissance company and the armored troops, advanced on an axis north