The 1st Cavalry Division deploys the 2nd Battalion, 7th Cavalry, at Ia Drang two miles to the northeast of Landing Zone X-Ray. There they are ambushed by Communist forces and nearly overrun until rescued by the 1st Battalion, 5th Cavalry. American losses are 276 men to an estimated 400 Viet Cong.
The most significant individual battle of the Vietnam War was fought on November 14, 1965 in the Ia Drang Valley in the Central Highlands. It was the first engagement of North Vietnamese Forces and an American unit, bolstered by the technology of the helicopter to deliver troops into battle. The 1st Air Cavalry Division prevailed, but not without sustaining significant casualties, and the victory was sealed when US airpower was unleashed against the numerically superior forces of the PAVN. This earliest of battles is described with great detail using eyewitness accounts in Hal Moore and Joe Galloway ‘ s We Were Soldiers Once and Young (2004 ). Such writing was possible because the authors had been involved in the battle as commander and reporter, respectively. They not only chronicle the battle moment by moment, but they offer a gripping analysis of the impact of the outcome of the battle on decision – making in Washington, Saigon and Hanoi. The American leadership assumed massive force and technology would always prevail, and the PAVN leadership decided to minimize force size to avoid casualties. They also realized that Cambodia provided sanctuary: “I was always taught as an officer that in a pursuit situation you continue to pursue until you either kill the enemy or he surrenders… Not to follow them into Cambodia violated every principle of warfare. It became perfectly clear to the North Vietnamese that they then had sanctuary; they could come when they were ready to fight and leave when they were ready to quit “. Ultimately, the North Vietnamese analysis of the battle and subsequent battlefield strategy would prevail.
Operations in mid-October by units of the 1st Air Cavalry provided intelligence on PAVN dispositions and General Westmoreland decided on a spoiling attack. This resulted in the Battle of the Ia Drang Valley, a forested area just east of the Chu Pong massif, from 23 October to 20 November. It was the first major battle between PAVN and US Army units and one of the war’s bloodiest encounters.
On 27 October Westmoreland committed a brigade of the 1st Air Cavalry to search-and-destroy operations. For two weeks there was sporadic but light contact between the opposing sides. This changed on 14 November. Over the next four days savage fighting erupted over landing zones (LZS) X-Ray and Albany. It began when Lieut. Col. Harold Moore’s understrength 1st Battalion of the 7th Cavalry Regiment-some 450 men-landed at LZ “XRay” almost on top of two PAVN regiments of 2,000 men. Outnumbered and in unfamiliar terrain, the Americans fought desperately. In bitter, sometimes hand-to-hand combat, the Americans drove back the attackers. Beginning the next day, 15 B-52 bombers from Guam began six days of Arc Light strikes on the Chu Pong massif. It was the first time that B-52s were employed in a tactical role in support of ground troops. Moore’s battalion was relieved by Lieut. Col. Robert Tully’s 2nd Battalion of the 7th Cavalry Regiment, which was then ordered to vacate LZ “X-Ray” and march overland to “Albany” two miles away. Three PAVN battalions ambushed the Americans en route, and in the most savage one-day battle of the war 155 Americans were killed and another 124 wounded.
The battle ended when PAVN units withdrew across the border into Cambodia. In a month of fighting the 1st Air Cavalry had lost 305 killed. The Americans estimated PAVN losses at 3,561, less than half of these confirmed. Both sides claimed victory. The PAVN learned they could survive high-tech American weapons and the new helicopter tactics. They also learned to minimize casualties by keeping combat troops close to US positions in what Giap referred to as his “grab them by the belt” tactic.
The PAVN had inflicted heavy casualties on the Americans, even while suffering horrendously themselves. But the PAVN leadership believed that even lopsided body counts favoured them and would eventually wear down American resolve. The Americans believed they had prevented a decisive PAVN success before the US deployment could be completed. Westmoreland and his chief deputy, General William DePuy, both of whom had learned their trade in the meat-grinder battles of World War II, saw their estimated 12 to 1 kill ratio advantage as proof that the war could be won through attrition, by carrying the conflict to the PAVN in search and destroy operations. Indeed, Time magazine selected General Westmoreland as its Man of the Year for 1965. In that year the United States lost 1,275 killed, 5,466 wounded, 16 captured, and 137 missing. RVN forces lost 11,403 killed, 23,296 wounded, and 7,589 missing. The Allies estimated VC/PAVN dead at 35,382 killed and 5,873 captured.
LTC Hal Moore, Commander of the 1st Battalion, 7th Cavalry, on the radio during the fight for LZ X-Ray in the Ia Drang Valley of Vietnam. Hal Moore regarded the battle as a draw, and I agree with that assessment. Another veteran put it, “The survivors of Landing Zone X-Ray have always had an aura of fame about them. They fought in the first violent “stand up” fight of the war, and they won… barely.”
The North Vietnamese Army attacked a Special Forces camp at Plei Me; when it was repulsed, Westmoreland directed the division to launch an offensive to locate and destroy enemy regiments that had been identified in the vicinity of the camp. The result was the Battle of the Ia Drang, named for a small river that flowed through the valley, the area of operations. For thirty-five days the division pursued and fought the North Vietnamese 32d, 33d, and 66th People’s Army of Vietnam (PAVN) Regiments, until the enemy, suffering heavy casualties, returned to his bases in Cambodia.
With scout platoons of its air cavalry squadron covering front and flanks, each battalion of the division’s 1st Brigade established company bases from which patrols searched for enemy forces. For several days neither ground patrols nor aeroscouts found any trace, but on November 4 the scouts spotted a regimental aid station several miles west of Plei Me. Quick-reacting aerorifle platoons converged on the site. Hovering above, the airborne scouts detected an enemy battalion nearby and attacked from UH-1B Huey gunships with aerial rockets and machine guns. Operating beyond the range of their ground artillery, Army units engaged the enemy in an intense firefight, killing ninety-nine, capturing the aid station, and seizing many documents.
The search for the main body of the enemy continued for the next few days, with Army units concentrating their efforts in the vicinity of the Chu Pong Massif, a mountain range and likely enemy base near the Cambodian border. Communist forces were given little rest, as patrols harried and ambushed them.
The heaviest fighting was yet to come. As the division began the second stage of its campaign, enemy forces began to move out of the Chu Pong base. Units of the U. S. 1st Cavalry Division’s 3d Brigade, which took over from the 1st Brigade, advanced to establish artillery bases and landing zones at the base of the mountain. Landing Zone X-RAY was one of several U. S. positions vulnerable to attack by the enemy forces that occupied the surrounding high ground. Here on November 14 began fighting that pitted three battalions against elements of two North Vietnamese regiments. Withstanding repeated mortar attacks and infantry assaults, the Americans used every means of firepower available to them-the division’s own gunships, massive artillery bombardment, hundreds of strafing and bombing attacks by tactical aircraft, earth-shaking bombs dropped by B-52 bombers from Guam, and, perhaps most important, the individual soldier’s M16 rifle-to turn back a determined enemy. The Communists lost more than 600 dead, the Americans 79.
Although badly hurt, the enemy did not leave the Ia Drang Valley. Elements of the 33d and 66th PAVN Regiments, moving east toward Plei Me, encountered the U. S. 2d Battalion, 7th Cavalry, a few miles north of X-RAY at Landing Zone ALBANY, on November 17. The fight that resulted was a bloody reminder of the North Vietnamese mastery of the ambush, as the Communists quickly snared four U. S. companies in their net. As the trapped units struggled for survival, nearly all semblance of organized combat disappeared in the confusion and mayhem. Neither reinforcements nor effective firepower could be brought in. At times combat was reduced to valiant efforts by individuals and small units to avert annihilation. When the fighting ended that night, almost 70 percent of the Americans were casualties and almost one of every three soldiers in the battalion had been killed.
Despite the horrific casualties from the ambush near Landing Zone ALBANY, the Battle of the Ia Drang was lauded as the first major American triumph of the Vietnam War. The airmobile division, committed to combat less than a month after it arrived in country, relentlessly pursued the enemy over difficult terrain and defeated crack North Vietnamese Army units. In part, its achievements underlined the flexibility that Army divisions had gained in the early 1960s under the Reorganization Objective Army Division (ROAD) concept. Replacing the flawed pentomic division with its five lightly armed battle groups, the ROAD division, organized around three brigades, facilitated the creation of brigade and battalion task forces tailored to respond and fight in a variety of military situations. The newly organized division reflected the Army’s embrace of the concept of flexible response and proved eminently suitable for operations in Vietnam. The helicopter was given great credit as well. Nearly every aspect of the division’s operations was enhanced by its airmobile capacity. During the battle, artillery units were moved sixty-seven times by helicopter. Intelligence, medical, and all manner of logistical support benefited as well from the speed and flexibility helicopters provided. Despite the fluidity of the tactical situation, airmobile command and control procedures enabled the division to move and keep track of its units over a large area and to accommodate the frequent and rapid changes in command arrangements as units moved from one headquarters to another.
Yet for all the advantages the division accrued from airmobility, its performance was not without blemish. Though the conduct of division-size airmobile operations proved tactically sound, two major engagements stemmed from the enemy’s initiative in attacking vulnerable American units. On several occasions massive air and artillery support provided the margin of victory, if not survival. Above all, the division’s logistical self-sufficiency fell short of expectations. It could support only one brigade in combat at a time, for prolonged and intense operations consumed more fuel and ammunition than the division’s helicopters and fixed-wing Caribou aircraft could supply. Air Force tactical airlift became necessary for resupply. Moreover, in addition to combat losses and damage, the division’s helicopters suffered from heavy use and from the heat, humidity, and dust of Vietnam, taxing its maintenance capacity. Human attrition was also high: hundreds of soldiers, the equivalent of almost a battalion, fell victim to a resistant strain of malaria peculiar to Vietnam’s highlands.
Westmoreland’s satisfaction in blunting the enemy’s offensive was tempered by concern that enemy forces might reenter South Vietnam and resume their offensive while the airmobile division recuperated at the end of November and during most of December. He thus requested immediate reinforcements from the Army’s 25th Infantry Division, based in Hawaii and scheduled to deploy to South Vietnam in the spring of 1966. By the end of 1965, the division’s 3d Brigade had been airlifted to the highlands and, within a month of its arrival, had joined elements of the 1st Cavalry Division to launch a series of operations to screen the border. Army units did not detect any major enemy forces trying to cross from Cambodia into South Vietnam. Each operation, however, killed hundreds of enemy soldiers and refined airmobile techniques, as Army units learned to cope with the vast territorial expanse and difficult terrain of the highlands.
Moore, Hall G., and Joseph L. Galloway ( 2004  ). We Were Soldiers Once and Young: Ia Drang – the Battle That Changed the War in Vietnam. Novato, CA: Presidio Press.