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 50th Infantry, 25th Division, were already in this area. Meanwhile, the 46th Infantry and one battalion of the 50th moved into the plantations north of Phú Hòa District Town to prevent PAVN infiltration across the Saigon River. Along Route 7, the 9th Infantry advanced without incident until 19 November when sharp fighting west of Base 82 resulted in over 40 ARVN soldiers wounded. The PAVN withdrew leaving 14 dead and many weapons and radios behind. The next morning, Reconnaissance Company, 9th Infantry, entered Rach Bap unopposed. The Iron Triangle campaign was virtually over, although mopping-up operations continued in the south