The target: War Zone C
War Zone C was an area of forest and scrubland in Tay Ninh province, north of Saigon and bordering Cambodia. For years it had been a Viet Cong base area, and American intelligence believed it housed the Central Office for South Vietnam, usually called COSVN, the communist command structure that directed the war in the south. If the headquarters could be found and destroyed, planners reasoned, the enemy’s operations might be badly disrupted.
Operation Junction City was planned as a follow-up to Cedar Falls in the Iron Triangle. It ran from 22 February to 14 May 1967 and was among the largest American operations of the war to that point. Roughly 25,000 American troops are usually cited, with South Vietnamese battalions as well, for a total in the neighbourhood of 30,000. It was designed in two phases. The first aimed to surround the area in a horseshoe shape, with units positioned along the north, east and west and a barrier of forces to the south, leaving Cambodia, which American forces could not enter, on the remaining side.
The opening and the parachute jump
The operation began on 22 February with a large helicopter assault, supported by an unusual feature: the only American combat parachute drop of the Vietnam War. Paratroopers of the 2nd Battalion, 503rd Infantry, part of the 173rd Airborne Brigade, jumped into the operational area. The drop went broadly as planned and encountered little resistance, but it was symbolic as much as tactical. Helicopters could have delivered the troops more quickly, and the jump is usually remembered because it was a historic one rather than because it changed the course of the operation.
Other units on the ground included elements of the 1st Infantry Division, the 25th Infantry Division, the 11th Armored Cavalry Regiment and the 196th Light Infantry Brigade, together with supporting artillery and engineers. Engineers cut roads and built airstrips and fire support bases, which served as the anchors for later sweeps.
The fighting
During the first phase, the troops found abandoned camps and supplies but few enemy fighters. The fighting grew heavier in the second phase, when American forces moved deeper into the zone and the Viet Cong decided to counterattack in a few places. Two engagements are often cited.
On 19 March, a night defensive position of the 1st Infantry Division near Ap Bau Bang was attacked by a Viet Cong force, and armoured vehicles and heavy firepower helped the Americans fend it off. Two days later, on 21 March, a battalion of the 25th Infantry Division was attacked at a position near Prek Klok and fought a fierce engagement. Other clashes took place around Suoi Tre and Soui Cut as the operation went on. These battles were costly to both sides, but American firepower, including artillery and air support, generally prevailed.
The Viet Cong tended to choose when to fight, striking at isolated positions and then breaking off. The ability to retreat across the border into Cambodia, where American units were not permitted to pursue, gave them a refuge that shaped the outcome.
Results
The military reported claims of around 2,700 enemy dead, which is the figure most often quoted, together with large quantities of captured rice, weapons, ammunition and documents, and considerable destruction of bunkers and supply installations. American losses were lower, but they were not trivial, and the operation produced hundreds of casualties among US forces and South Vietnamese troops. Body counts were the standard measure of success in those years, and as always they should be treated with caution.
What the operation did not do was capture the headquarters it was designed to find. COSVN was not located. The enemy command had moved, as it often did, and much of its leadership and many of its units had slipped across the border or dispersed into smaller groups. Within weeks of the operation’s end, the Viet Cong had begun to use the area again, and larger formations were again operating in and around War Zone C. In late 1967, fighting broke out at Loc Ninh and elsewhere in the same border region.
A limited result
By the standard of the operation’s own goals, Junction City produced a limited result. It disrupted enemy supply networks and forced the Viet Cong to move out of some bases for a time, and the captured material gave the allies useful intelligence. But the lasting effect was small. The forces involved could not stay in the area, since they were needed elsewhere, and the South Vietnamese government lacked the strength to hold the ground afterwards. Unlike a conventional campaign, there was no front line to advance, and no decisive victory to be achieved.
This pattern, in which large American operations inflicted losses but did not change who controlled the territory, was one of the central arguments of critics of attrition. It also fed a wider unease. If the Americans could repeatedly sweep through enemy areas and still not break the enemy’s ability to fight, then the optimistic claims of progress, such as those General Westmoreland made later in the year, were hard to square with events. The same dilemma was visible during the battles in the Central Highlands later in 1967, and it appears again in the wider account of the Vietnam War in 1967.
Why it is remembered
Junction City is remembered for its size, for the parachute drop, and for what it showed about the character of the war: enormous mobility and firepower on one side, and an adversary able to avoid battle or accept it on its own terms on the other. For the men who took part, it was a series of exhausting patrols, sudden ambushes and nights spent in fortified positions in hot, dusty country. For historians, it is a useful example of the distance between tactical success and strategic result.