IV.

Escalated United States Involvement: 1965-1969

When some of the soldiers of the U.S. 9th Marine Regiment landed in Da Nang in March 1965, their orders were to protect the U.S. air base, but the mission was quickly escalated to include search-and-destroy patrols of the area around the base. This corresponded in miniature to the larger strategy of General William Westmoreland. Westmoreland, who took over the Military Assistance Command in Vietnam (MACV) in 1964, advocated establishing a large American force and then unleashing it in big sweeps. His strategy was that of attrition—eliminating or wearing down the enemy by inflicting the highest death toll possible. There were 80,000 U.S. troops in Vietnam by the end of 1965; by 1969 a peak of about 543,000 troops would be reached.

Having easily pushed aside the ARVN, both the North Vietnamese and the NLF had anticipated the U.S. escalation. With full-scale movement of U.S. troops onto South Vietnamese territory, the Communists claimed that the Saigon regime had become a puppet, not unlike the colonial collaborators with the French. Both the North Vietnamese and NLF appealed to the nationalism of the Vietnamese to rise up and drive this new foreign army from their land.

A.

DRV and NLF Strategy

The strategy developed against the United States was the result of intense debate between the northern and southern members of the Lao Dong’s Political Bureau in Hanoi. Truong Chinh, a northerner and the leading Communist ideologist in Hanoi, argued that the southern Vietnamese must liberate themselves, in accordance with a “people’s war” strategy that would, if successful, result in a reunified Vietnam; Le Duan, a southerner who became secretary general of the Lao Dong, advocated the North’s full support of the armed struggle in the South, on the premise that Vietnam was one nation and therefore dependent on all Vietnamese for its independence and reunification. Ho Chi Minh, revered widely throughout Vietnam as the father of independence, and other party leaders ultimately sided with Duan’s point of view. Duan’s triumph represented a major turning point within the party in which southerners came to dictate party policy in Hanoi. The Central Committee Directorate for the South (also known as the Central Office for South Vietnam, or COSVN), formed in 1961 as the leadership group of the newly merged southern and central branches of the Lao Dong, was able to coordinate a unified strategy. COSVN was under the direction of Nguyen Chi Thanh, a southerner and a PAVN general, for most of the war.

After the United States initiated large-scale bombing against the DRV in 1964, in the wake of the Gulf of Tonkin incident, Hanoi dispatched the first unit of northern-born regular soldiers to the south. Previously, southern-born Viet Minh, known as regroupees, had returned to their native regions and joined NLF guerrilla units. Now PAVN regulars, commanded by generals who usually had been born in the south, began to set up bases in the Central Highlands of South Vietnam in order to gain strategic position.

Unable to cross the Demilitarized Zone (DMZ) at the 17th parallel separating North from South Vietnam, PAVN regulars moved into South Vietnam along the Ho Chi Minh Trail through Laos and Cambodia. In use since 1957, the trail was originally a series of footpaths; by the late 1960s it would become a network of paved highways that enabled the motor transport of people and equipment. The NLF guerrillas and North Vietnamese troops were poorly armed compared to the Americans, so once they were in South Vietnam they avoided open combat. Instead they developed hit-and-run tactics designed to cause steady casualties among the U.S. troops and to wear down popular support for the war in the United States.

B.

United States Strategy

In June 1964 retired general Maxwell Taylor replaced Henry Cabot Lodge as ambassador to South Vietnam. A former chairman of the Joint Chiefs of Staff, the military advisory group to the president, Taylor at first opposed the introduction of American combat troops, believing that this would make the ARVN quit fighting altogether. By 1965 he agreed to the request of General Westmoreland for combat forces. Taylor initially advocated an enclave strategy, where U.S. forces would seek to preserve areas already considered to be under Saigon’s control. This quickly proved impossible, since NLF strength was considerable virtually everywhere in South Vietnam.

In October 1965 the newly arrived 1st Cavalry Division of the U.S. Army fought one of the largest battles of the Vietnam War in the Ia Drang Valley, inflicting a serious defeat on North Vietnamese forces. The North Vietnamese and NLF forces changed their tactics as a result of the battle. From then on both would fight at times of their choosing, hitting rapidly, with surprise if possible, and then withdrawing just as quickly to avoid the impact of American firepower. The success of the American campaign in the Ia Drang Valley convinced Westmoreland that his strategy of attrition was the key to U.S. victory. He ordered the largest search-and-destroy operations of the war in the “Iron Triangle,” the Communist stronghold in the rural provinces near Saigon. This operation was intended to find and destroy North Vietnam and NLF military headquarters, but the campaign failed to wipe out Communist forces from the area.

By 1967 the ground war had reached a stalemate, which led Johnson and McNamara to increase the ferocity of the air war. The Joint Chiefs of Staff had been pressing for this for some time, but there was already some indication that intensified bombing would not produce the desired results. In 1966 the bombing of North Vietnam’s oil facilities had destroyed 70 percent of their fuel reserves, but the DRV’s ability to wage the war had not been affected.

Planners wished to avoid populated areas, but when 150,000 sorties per year were being flown by U.S. warplanes, civilian casualties were inevitable. These casualties provoked revulsion both in the United States and internationally. In 1967 the chairman of the Joint Chiefs of Staff, General Earle Wheeler, declared that no more “major military targets” were left. Unable to widen the bombing to population centers for fear of Chinese and Soviet reactions in support of North Vietnam, the U.S. Department of Defense had to admit stalemate in the air war as well. The damage that had already been inflicted on Vietnam’s population was enormous.

C.

The Tet Offensive and Beyond

In 1967 North Vietnam and the NLF decided the time had come to mount an all-out offensive aimed at inflicting serious losses on both the ARVN and U.S. forces. They planned the Tet Offensive with the hope that this would significantly affect the public mood in the United States. In December 1967 North Vietnamese troops attacked and surrounded the U.S. Marine base at Khe Sanh, placing it under siege. Westmoreland ordered the outpost held at all costs. To prevent the Communists from overrunning the base, about 50,000 U.S. Marines and Army troops were called into the area, thus weakening positions further south.

This concentration of American troops in one spot was exactly what the COSVN strategists had hoped would happen. The main thrust of the Tet Offensive then began on January 31, 1968, at the start of Tet, or the Vietnamese lunar new year celebration, when a lull in fighting traditionally took place. Most ARVN troops had gone home on leave, and U.S. troops were on stand-down in many areas. Over 85,000 NLF soldiers simultaneously struck at almost every major city and provincial capital across South Vietnam, sending their defenders reeling. The U.S. Embassy in Saigon, previously thought to be invulnerable, was taken over by the NLF, and held for eight hours before U.S. forces could retake the complex. It took three weeks for U.S. troops to dislodge 1,000 NLF fighters from Saigon.

During the Tet Offensive, the imperial capital of Hue witnessed the bloodiest fighting of the entire war. South Vietnamese were assassinated by Communists for collaborating with Americans; then when the ARVN returned, NLF sympathizers were murdered. United States Marines and paratroopers were ordered to go from house to house to find North Vietnamese and NLF soldiers. Virtually indiscriminate shelling was what killed most civilians, however, and the architectural treasures of Hue were laid to waste. More than 100,000 residents of the city were left homeless.

The Tet Offensive as a whole lasted into the fall of 1968, and when it was over the North Vietnamese and the NLF had suffered acute losses. The U.S. Department of Defense estimated that a total of 45,000 North Vietnamese and NLF soldiers had been killed, most of them NLF fighters. Although it was covered up for more than a year, one horrifying event during the Tet Offensive would indelibly affect America’s psyche. In March 1968 elements of the U.S. Army’s Americal Division wiped out an entire hamlet called My Lai, killing 500 unarmed civilians, mostly women and children.

After Tet, Westmoreland said that the enemy was almost conquered and requested 206,000 more troops to finish the job. Told by succeeding administrations since 1955 that there was “light at the end of the tunnel,” that victory in Vietnam was near, the American public had reached a psychological breaking point. The success of the NLF in coordinating the Tet Offensive demonstrated both how deeply rooted the Communist resistance was and how costly it would be for the United States to remain in Vietnam. After Tet a majority of Americans wanted some closure to the war, with some favoring an immediate withdrawal while others held out for a negotiated peace. President Johnson rejected Westmoreland’s request for more troops and replaced him as the commander of U.S. forces in Vietnam with Westmoreland’s deputy, General Creighton Abrams. Johnson himself decided not to seek reelection in 1968. Republican Richard Nixon ran for the presidency declaring that he would bring “peace with honor” if elected.