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 with about 10 T-54 and PT-76 tanks, were employed against the dispersed 321st RF Battalion. The 2nd Regiment overran Rach Bap and continued the attack south into the Triangle along Route 14, while the 95C Regiment attacked Base 82 and An Dien. The 271st Regiment was held in reserve. The ARVN at Ben Cat were unable to counterattack the PAVN immediately at An Dien because the bridgehead held by the RF was too shallow to protect the crossing of any large forces, but III Corps commander Lt. Gen. Phạm Quốc Thuần quickly began reinforcing Bến Cát. Task Force 318 arrived