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 whose troops had been in heavy combat for a month, with the 5th Division. Instead of relieving the 18th, General Thuần decided to try his armor again. Holding the infantry in position, he sent the 318th and 322nd Task Forces back into the Triangle, one north of Route 7, the other generally along the road. The PAVN's antitank defenses, primarily employing the 82-mm. recoilless gun, stopped the attack once again, destroying 13 M113 armored personnel carriers and 11 M48 tanks between 27 June and 1 July, even though ARVN artillery and the RVNAF supported the attack with 43,000 rounds and