Battle of the Iron Triangle Battle of the Iron Triangle The Battle of the Iron Triangle took place from 16 May to 20 November 1974, when the People's Army of Vietnam (PAVN) 9th Division captured Rach Bap and An Dien The Army of the Republic of Vietnam (ARVN) regained the lost towns in a series of costly counterattacks. The Iron Triangle was an important strategic location, bounded on the north by the jungle and overgrown rubber plantations of the Long Nguyen Secret Zone, on the west by the Saigon River and on the east by the smaller but unfordable obstacle of the Thi Thinh River.
Battle of the Iron Triangle Triangle on the night of 2/3 June, The fighting at An Dien wos especially fierce on 3 June as the PAVN used tanks against ARVN infantry. Armed with light antitank weapons, ARVN infantry knocked out at least 4 tanks in the final day of the battle. On 4 June, troops of the 18th ARVN Division finally entered An Dien and on the 5th overran the last position of the 95C Regiment, which had since been reinforced by elements of the 271st Regiment. On the morning of the 5th, two battalions of the 48th and two of the 52nd were holding