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 had been killed. The expected PAVN counterattack came on the night of 5/6 June as two battalions of the 271st Regiment, supported by up to 14 tanks attacked from two directions. The ARVN held and its infantrymen knocked out 5 tanks and damaged 5 others. The second phase or the Iron Triangle campaign was over with the recapture of An Dien, and General Thuần was anxious to get the attack moving again toward Base 82 and Rach Bap. Although the An Dien bridge would soon be in condition to carry the tanks of the 318th Task Force, one company of