A. Introduction

The term “Cold War” was popularized by journalist Walter Lippmann in 1947 and stuck ever since, but it’s something of a misnomer. It implies the absence of direct military conflict which, outside of Europe, was never remotely true. The Cold War actually unfolded alongside another sweeping global transformation called decolonization. Across Asia, Africa, the Middle East, and Latin America, movements for independent nationhood gained momentum as territories long controlled by European empires sought to govern themselves. Americans would come to call these newly independent states the Third World, which differentiated them from countries aligned with the United States (the First World) and those aligned with the Soviets (the Second World). While some decolonizing countries tried to remain neutral, this was often impossible, so much of the Cold War was about trying to push Third World nations to choose sides.

This manifested as a series of endless proxy wars and interventions into local conflicts. Different sides of civil wars might align themselves with either the United States or Soviet Union, which often pushed their opponents to look for support from the other. These wars were as hot as wars can be: outside Europe and the United States, the Cold War was an experience of extraordinary devastation. This was most true in Asia, which one historian calls the “Cold War killing fields.”¹ Eighty percent of American and Soviet foreign aid ended up in Asia, which experienced decades of catastrophic violence that killed more than fourteen million people. 95% of all Soviets and 99.9% of the Americans who died in the Cold War did so within Asian countries.

For the American public, the most important and transformative of these Asian conflicts was in Vietnam. What Americans call the Vietnam War was really a twenty-year conflict spread over four countries that killed upwards of four million people, including 50,000 Americans. Perhaps only the Civil War divided the country more than Vietnam, and the ripple effects of that conflict are still felt throughout the country today. In southeast Asia, meanwhile, the war was utterly destabilizing and devastating. In retrospect, it can be hard to remember: why did the United States engage in such a brutal, seemingly endless war in a region that most Americans knew very little about? American intervention in Vietnam only begins to make sense within a much larger context.

B. Actually Existing Containment

Containment became the default American strategy in the Cold War but serious alternatives attracted support. Some conservatives, like Robert Taft, remained uneasy about global entanglements and preferred a return to isolationism, though that approach was discredited by World War II. On the other side, some left-wingers like Henry Wallace argued that containment was unnecessarily hostile and pushed for peaceful coexistence with the Soviet Union. Although this had likely been Roosevelt’s preferred strategy, cold warriors dismissed it as naive or overly sympathetic to communism.

A third alternative, known as rollback, took a far more aggressive stance. Instead of containing communism, it aimed to remove it from the places where it already existed. This approach appealed to hardliners like John Foster Dulles who called for the “liberation” of communist-controlled regions.² The risk of this strategy was starting World War III, a nuclear apocalypse, and the end of humanity itself. But hardliners raised a provocative question: what if it didn’t? President Truman briefly moved in this direction during the Korean War but ultimately pulled back, reaffirming containment as the safer course.

Many expected more aggressive foreign policy with the election of Dwight D. Eisenhower whose campaign criticized Truman for being too cautious. But Eisenhower also proved to be restrained. Rather than rollback, his foreign policy was called the “New Look”: an effort to maintain containment while avoiding costly ground wars like Korea. Central to this approach was Secretary of State John Foster Dulles, who promoted massive retaliation: the threat to use the nuclear arsenal against any perceived communist aggression. In theory, this would deter conflict without the need for conventional wars. In practice, however, it made every crisis dangerous. A small regional conflict carried the risk of nuclear escalation while an arms race between the superpowers was accelerating. 

The main problem with massive retaliation is that it could weaken American credibility—the belief that the country would actually follow through on its commitments. Many conflicts were simply too small and regional to justify the threat of nuclear war, so how could the country maintain its credibility without backing down or risking catastrophe? Part of the answer was what we now call soft power: attracting other countries through diplomacy, cultural exchange, and economic assistance. American officials funded development projects, supported friendly governments, and promoted U.S. culture abroad. Even jazz became a diplomatic tool, as musicians like Louis Armstrong and Duke Ellington toured internationally, showcasing American creativity while quietly countering Soviet criticism about racism at home. 

Soft power was only part of the story. Increasingly, policymakers relied on covert action. The Central Intelligence Agency (CIA), led by Allen Dulles, became a key instrument of Cold War strategy by using espionage and secret operations to shape political outcomes abroad. The first major test came in Iran. During World War II, oil became essential to the global economy, and Iran held some of the world’s largest reserves. For decades, Britain had dominated Iranian oil through the Anglo-Persian Oil Company (now BP). But in 1951, Mohammed Mossadegh was elected prime minister and demanded that Iranians control their own natural resources. While western powers briefly celebrated him as reformer, they were alarmed by the threat of nationalization and the possibility of increased Soviet influence.

In 1953, Eisenhower approved Operation Ajax, a CIA operation with British intelligence, that would overthrow Mossadegh in a coup. The plotters flooded Iran with propaganda, paid protestors, carried out false flag attacks, and backed military units seeking to reinstate the Shah—an authoritarian monarch aligned with western interests. For the next quarter century, he ruled Iran with both an iron fist and American backing while allowing western companies to dominate oil fields.

One year later, a similar pattern unfolded in Guatemala. President Jacobo Árbenz was elected on a promise to redistribute land to peasants by seizing it from large estates, many of them owned by American corporations like United Fruit Company. Like Mossadegh before him, Árbenz was not a communist and had little direct support from Moscow. But Washington viewed ideas like land reform or nationalization as symptoms of communist influence. In 1954, the CIA launched a covert operation using propaganda, psychological warfare, and support for rebel forces to destabilize the government. Fearing an American invasion, Árbenz resigned and fled. For the next four decades, Guatemala was ruled by a series of U.S.-backed dictators and death squads.

These were the first two of what would become a dizzying number of covert American interventions into governments across the world from Albania to Congo to Indonesia to Brazil. This is what containment often looked like on the ground. But these early operations established a series of troubling patterns for American foreign policy that would eventually push the country toward a disaster in Vietnam. First, they demonstrated a clear willingness to protect authoritarian regimes if policymakers believed it served American economic or strategic interests. Second, it showed a tendency to misinterpret local struggles and nationalist movements as part of the Cold War. And third, it showed excessive faith in the United States’ ability to control world affairs without committing large numbers of troops.

C. Indochina

The Vietnam War did not begin as part of the Cold War: it was a much older struggle against colonialism and for national independence. But containment tended to flatten all global conflicts, no matter how complicated or unrelated, into just another front in the global rivalry between the United States and the Soviet Union. This would be the case in Southeast Asia as well.

During the nineteenth century, Vietnam was colonized by France and combined with Cambodia and Laos to form the colony French Indochina. During World War II, Japan occupied the colony but allowed French officials to remain in place as long as the region ultimately served Japanese interests. By 1944, Japan had seized so much food from the colony to supply its own military that it caused a catastrophic famine that killed more than a million people. That disaster totally discredited Japanese and French rule in the eyes of many Vietnamese, many of whom supported a nationalist insurgency called Viet Minh. This was a diverse movement unified only by a desire for a fully independent Vietnamese state. However, its leader Hồ Chí Minh was a communist.

The Viet Minh drew inspiration from the American Revolution and received limited support from the Roosevelt Administration. By the end of World War II, it was the most powerful force in Vietnam, with strong support in the rural north. When Japan surrendered in 1945, the Viet Minh quickly filled the power vacuum, seized major cities, and declared independence. The French, however, were unwilling to relinquish control of their colony, sparking the First Indochina War.

The Truman Administration was initially sympathetic to the Viet Minh and its goal of independence. But that changed with the Chinese Revolution and Korean War. Because Hồ Chí Minh was a communist, it was easy to portray him as a possible Soviet or Chinese puppet, which made French victory suddenly seem important. Truman and Eisenhower sent military advisors to assist while gradually funding more and more of a losing French war effort. Finally, the French were decisively defeated in 1954.

French Indochina was split into Laos, Cambodia, a non-communist South Vietnam, and a communist North Vietnam. With the backing of the United States, South Vietnam consolidated under the control of Ngô Đình Diệm, a competent anticommunist whose authoritarianism stabilized the country but alienated many of his own citizens. CIA officer Edward Lansdale served as a key adviser who helped maintain Diệm’s rule and organize his political strategy. In Vietnam, the CIA organized anticommunist propaganda campaigns and re-education camps while assisting in the evacuation of hundreds of thousands of Catholic refugees from North Vietnam into the South.

As with Korea, the partition of Vietnam was supposed to be temporary, with nationwide elections to reunify the country scheduled for 1956. But it was clear to everyone that any elections would yield a communist government so, with the backing of the United States, Diệm refused to hold them, arguing that free elections were impossible under communism. With peaceful political reunification now impossible, the conflict between North and South Vietnam quickly escalated toward armed struggle.

Within South Vietnam, an insurgency calling itself the National Liberation Front (NLF) formed against the Diệm regime, whom they saw as an illegitimate puppet of the United States. Americans would know them better as the Viet Cong (VC). Although led by communists, the VC was really a broad coalition of diverse groups united by opposition to Diệm and American influence. As their ally came under growing threat, the United States deepened its commitment, sending more weapons, money, and advisers to train the South Vietnamese army. At the same time, the Diệm regime grew more repressive and unpopular, especially in rural areas where corruption and heavy-handed policies fueled resentment. This made it easier for insurgents to recruit and build extensive underground networks. By the end of the decade, the situation was spiraling out of control.

D. Cuba

American actions in Southeast Asia were shaped, in part, by events closer to home. In Latin America, decades of U.S. support for unpopular dictators bred widespread resentment. In 1958, Vice President Richard Nixon was nearly killed during a goodwill tour of Venezuela when an angry mob attacked his motorcade. Tensions were even more explosive in Cuba, where the United States supported Fulgencio Batista, a military dictator with close ties to organized crime and a brutal security force. Batista allowed American companies substantial control over Cuban natural resources, including sugar plantations where desperately poor workers were starved and brutalized.

Batista was overthrown in 1959 by a nationalist insurgency led by lawyer Fidel Castro. This Cuban Revolution was supported by a diverse coalition, all united by hostility toward dictatorship and foreign control. Castro’s government quickly moved to improve the lives of ordinary Cubans through expanded education, healthcare, racial integration, and land redistribution. While Castro hoped to maintain good relations with the United States, land reform meant seizing refineries, plantations, banks, and land from American companies. Combined with fears of potential Soviet influence, these decisions led Washington to try to isolate Cuba both diplomatically and economically.

Although Castro did not initially identify as a communist, speaking of the revolution only as nationalist and democratic, increased tensions with the United States turned his attention toward the Soviet Union for needed aid. That meant strengthened communist influence within his movement and, by 1961, Castro rejected the need for elections, arguing that he would be responsive to the needs of the people, effectively establishing himself as a dictator.

A revolutionary government aligned with the Soviet Union just ninety miles from Florida alarmed American policymakers. With the blessing of President John F. Kennedy, the CIA trained a small force of Cuban exiles to invade the island, hoping to spark a popular revolt against Castro. The Bay of Pigs Invasion was, instead, a spectacular failure and public embarrassment for the Kennedy Administration. This was followed by Operation Mongoose, a covert program involving dozens of attempts to assassinate Castro as well as a campaign of terror that attacked ships, infrastructure, and industries throughout Cuba.

Soviet leader Nikita Khrushchev viewed Kennedy as “too intelligent and too weak,” so he moved to both protect Castro and counter an American nuclear threat.³ Two years earlier, the United States placed nuclear weapons in Turkey, within striking distance of Moscow. Now the Soviets would respond with missiles in Cuba. On October 16, 1962, Kennedy was informed that spy planes had spotted missile launch sites on the island. Most of his advisors called for a full-scale invasion, but Kennedy believed the Soviets could not simply back down: “If they don’t take action in Cuba,” he figured, “they certainly will in Berlin.”⁴ Instead, he opted for a naval blockade, hoping to prevent missiles from being delivered to the island. Eight days later, he informed the public, warning that any missiles launched from Cuba would result in a nuclear strike on the Soviet Union.

The Cuban Missile Crisis brought the world to the verge of nuclear war. A catastrophe was barely averted twice. On October 26, an American spy plane was shot down over Cuba. The Kennedy Administration planned to automatically attack Cuba in such an event but, at the last minute, decided against it. The following day, the U.S. navy dropped a depth charge near a Soviet submarine, unaware that it carried nuclear torpedoes and had lost all communication. Most of the Soviet crew believed the war must have begun, and prepared to fire a nuclear warhead. But Soviet protocol required three officers to agree to fire the weapon—two did so, but one refused.

President Kennedy knew that attacking Cuba would result in an exchange of missiles, and had been told that a nuclear war would kill at least a third of the world’s population. He was ready to attack anyway. Fidel Castro knew that launching a nuclear missile would result in the total destruction of his nation. He was ready to use them. Nikita Khrushchev knew all of this and that there were already 162 nuclear warheads in Cuba. Khrushchev sent memo to Kennedy reading: 

Mr. President, we and you ought not now to pull on the ends of the rope in which you have tied the knot of war, because the more the two of us pull, the tighter that knot will be tied. And a moment may come when that knot will be tied so tight that even he who tied it will not have the strength to untie it, and then it will be necessary to cut that knot, and what that would mean is not for me to explain to you... I have participated in two wars and know that war ends when it has rolled through cities and villages, everywhere sowing death and destruction.

Knowing they were days or hours from the end of time, Khrushchev accepted an offer to de-escalate. In exchange for publicly removing Soviet missiles, the United States would secretly remove theirs from Turkey while pledging not to invade Cuba. “At the end we lucked out,” Defense Secretary Robert McNamara would later exclaim, “It was luck that prevented a nuclear war!”⁵

At the time, however, American policymakers concluded that they had won the conflict and that the lesson of Cuba was that Cold War confrontations demanded a steely resolve—that the credibility of the United States depended on a willingness to follow through with their threats. Appearing to back down, they believed, would only invite further challenges from adversaries while eroding confidence among their allies. Determined not to repeat the embarrassment of Cuba, the Kennedy administration became even more committed to demonstrating resolve abroad, even at the risk of escalation. In Vietnam, this translated into a growing willingness to deepen American involvement, as officials came to see the conflict not only as a regional struggle but as a test of American credibility in the global Cold War.

E. Johnson's War

By 1961, the government in South Vietnam was in legitimate danger of collapsing as the VC insurgency dramatically expanded its operations into rural areas. Still stinging from the Bay of Pigs disaster, but hoping to avoid deploying troops, Kennedy listened to intelligence officials who suggested that increasing aid and military advisers could stabilize the Diệm government. With so much of the insurgency concentrated in rural areas, the U.S. designed the Strategic Hamlet Program: relocating millions of rural villagers into kind of concentration camps where, hopefully, it would make it easier for the South Vietnamese military to separate insurgents from ordinary peasants. But forcing villagers to leave their homes only exacerbated resentment toward the government, as did poor planning and corruption, which allowed militants to easily infiltrate the camps anyway.

Diệm did not help matters. Although South Vietnam was religiously diverse, his government was widely perceived to favor Catholics, which deepened resentment among Buddhists and others. Tensions escalated in May 1963 in Huế, when an effective ban on displaying the Buddhist flag sparked protests. Government forces responded with extraordinary violence, killing several civilians and triggering nationwide outrage. In the months that followed, Buddhist demonstrations demanding religious equality met with further crackdowns, creating an escalating cycle of protest and repression known as the Buddhist Crisis. The crisis drew global attention when the monk Thích Quảng Đức publicly self-immolated in Saigon, an image that came to symbolize the deepening instability of the Diệm regime.

By October 1963, U.S. officials had lost confidence in Diệm, believing that his repression undermined his legitimacy and weakened the fight against the VC. President Kennedy indicated support for South Vietnamese generals who were already discussing the possibility of a coup, believing a change in leadership would stabilize the regime without requiring American ground troops. Working with the CIA, these generals arrested Diệm on November 2, 1963 and—to the surprise of Kennedy—shot him in the face. Twenty days later, President Kennedy was himself assassinated in Dallas. In Saigon, Diệm was succeeded by a government more unstable and incompetent than himself. In Washington, Kennedy was succeeded by Lyndon Johnson.

By the time Johnson took office, South Vietnam seemed on the verge of total collapse, so many officials believed there was a relatively simple choice: send in ground troops or let the country fall. Johnson was a domestic reformer with relatively little interest in foreign affairs. But needing to win re-election the following year, he feared the consequences of looking “soft” on communism. Kennedy’s hawkish military advisors believed that allowing South Vietnam to fall to communism would permanently damage the United States’ credibility. So even as he doubted the United States could possibly win, Johnson came to believe there was little choice but to escalate. Of course, they would need a legitimate reason to convince the American public to go to war.

This came in August 1964 when reports from the Gulf of Tonkin suggested that North Vietnamese torpedo boats had attacked a U.S. destroyer off the coast of North Vietnam. While there was an exchange of gunfire, the torpedo attack never happened. But officials from Washington treated confusing and uncertain reports as credible, and Johnson described the Gulf of Tonkin Incident as “unprovoked aggression.”⁶ He requested that Congress provide a resolution that would allow him to use military force in Vietnam without a formal declaration of war, which it did with overwhelming support. By March 1965, the first thousands of combat troops landed in Da Nang. By the end of the year, there were nearly 200,000 Americans on the ground in Vietnam.

F. Hearts and Minds

The stated goal of the American war in Vietnam was to preserve an independent, non-communist South Vietnam. This would mean destroying the Viet Cong insurgency while strengthening the South Vietnamese government, without sparking a larger conflict with China or the Soviets. But building a stable South Vietnam while waging a brutal and destructive war within its borders was a contradiction that, particularly in retrospect, seems doomed to failure. Making matters worse, American leaders interpreted the conflict solely through the lens of the Cold War, which led them to underestimate the resolve of their opponents, who understood it as a struggle for their own liberation.

To defeat the insurgency, General William Westmoreland and Secretary of Defense Robert McNamara pursued a strategy of attrition: inflicting enough losses to break the enemy’s will to fight. The goal was to reach the “crossover point,” where enemy deaths exceeded their ability to replace them. This approach relied heavily on American technological advantages: helicopters, surveillance systems, and massive firepower. And so the war produced enormous destruction.

The United States carried out vast bombing campaigns across Indochina that were almost staggering in scope and intensity. American forces sprayed seventy million liters of herbicides like Agent Orange, which defoliated huge amounts of forest and farmlands while leaving a legacy of cancer and birth defects. They dropped thousands of tons of napalm, reformulated to stick to human bodies better. They supplemented both with more than four billion pounds of munitions like the pineapple, a tiny bomb that released steel pellets upon detonation. A single B-52 bomber could drop 1,000 pineapples, releasing 250,000 ball bearings that could tear into everything and everyone caught in its radius.

The total tonnage of bombs dropped by the United States in Vietnam and neighboring countries exceeded that used by all sides during World War II. Despite the tremendous scale of destruction, the bombing failed to achieve its central objectives. North Vietnam continued to move troops and supplies into the South along the Ho Chi Minh Trail, a vast network of paths, tunnels, and roads into neighboring Laos and Cambodia. They mobilized nearly their entire population into the war effort, rebuilding bridges, roads, and facilities with remarkable speed, often moving them underground.

The heavy reliance on air power meant that many captured Americans were pilots shot down over North Vietnam. Their treatment became another point of conflict. North Vietnam maintained that the United States was waging an illegal war of aggression and often referred to captured Americans as war criminals, rather than recognizing them as prisoners of war under the Geneva Conventions. As a result, American prisoners were frequently subjected to extremely harsh conditions, malnutrition, and sometimes torture. Facilities such as Hỏa Lò Prison, nicknamed the “Hanoi Hilton” by its inmates, became infamous for their conditions. Although the United States formally adhered to the Geneva Conventions, enforcement was uneven, so abuses were common within the context of a difficult guerrilla war.

As air power failed to produce decisive results, the United States became increasingly committed to a manpower-intensive ground war.  Nearly three million Americans served in Vietnam over the next decade. The military relied heavily on young draftees, creating what one observer described as an army of eighteen-year-olds whose main goal was "to turn 19.”⁷ The draft was intended to distribute service randomly, but student deferments allowed many college students to avoid service while wealthier families used connections to secure their sons positions in the National Guard, much less likely to see combat. As a result, those who served were disproportionately drawn from the working classes, leading one historian to call this the “working-class war.”⁸

With its ground troops, the military came to rely heavily on a strategy known as search and destroy, in which infantry units conducted patrols through the South Vietnamese countryside, attempting to locate and engage insurgents in conventional firefights where American firepower could annihilate them. In practice, this often meant long and exhausting patrols punctuated by sudden bursts of combat. Insurgents frequently avoided engagement by blending into the landscape or civilian population, leaving many soldiers to experience the war as a mix of boredom, fear, and physical strain.

Counterinsurgencies lack clear front lines, so demonstrating progress can be difficult. This was compounded by McNamara who insisted that progress must always be measurable. When told he needed to consider the hearts and minds of ordinary Vietnamese, he scoffed, noting that feelings cannot be quantified so were effectively irrelevant. American forces instead came to rely on body count, rewarding units that produced higher numbers of enemy deaths, something that was easy to quantify. General Westmoreland, meanwhile, believed that “The Oriental doesn’t put the same high price on life as does the Westerner… Life is cheap in the Orient.”⁹ This racist logic suggested an enemy willing to absorb enormous losses, so victory would require a tremendous amount of death to break their will. The simple conflation of killing with progress, combined with widespread racist attitudes, led to the famous formulation: “if it’s dead and Vietnamese, it’s VC.”¹⁰ All of this guaranteed the killing of noncombatants and atrocities. As one medic lamented, body count created “a real incentivizing of death and it just fucked with our value system.”¹¹ 

American officials did eventually recognize that defeating a communist insurgency required  more than battlefield victories. “The ultimate victory,” President Johnson argued, “will depend on the hearts and minds of the people who actually live out there.”¹² But aid programs and development efforts were routinely undercut by search-and-destroy missions, heavy bombing, and the forced relocation of villagers. The United States was destroying the very communities it needed to win over.  The war’s contradictory logic was captured in a widely cited remark by an American officer after the destruction of the town of Bến Tre and the deaths of many civilians: "It became necessary to destroy the town to save it."¹³ By 1967, Robert McNamara had come to believe that the war could not be won “short of the virtual annihilation of North Vietnam and its people.” Most of Johnson’s advisors rejected this assessment, so McNamara was fired.

G. The Early Antiwar Movement

On November 2, 1965, Norman Morrison took his one-year-old daughter Emily from their home in Baltimore and stood outside the office of Robert McNamara at the Pentagon. Morrison was a Quaker, a Christian sect associated with pacifism, and he strongly opposed escalation in Vietnam. He was particularly outraged by the use of napalm, which would burn tens of thousands of Vietnamese civilians over the following decade. Very suddenly, Morrison handed Emily to someone in the crowd, doused himself with gasoline, and set himself on fire. The act shocked observers including McNamara who would later call it “an outcry against the killing that was destroying the lives of so many Vietnamese and American youth.”¹⁴

Morrison became a folk hero in North Vietnam, celebrated as a man who gave his life to protest his own country’s aggression. Five days later, the poet Tố Hữu wrote “Emily, My Child,” imagining Morrison explaining his decision to his daughter. In the United States, however, most people in 1965 found the act nearly impossible to understand. A majority still supported escalation, trusting officials who framed the war as an effort to contain communism while promising a quick victory. Reporting from the Vietnamese countryside was dangerous and limited, so many journalists relied on optimistic government accounts. Even a year later, the pro-war song “Ballad of the Green Berets” became one of the biggest hits of 1966, reflecting the breadth of public support. What later came to seem like a tragic expression of moral protest initially struck many Americans as bewildering or extreme.

Early resistance to the war was concentrated among college students and religious activists. Many universities were deeply entangled in the war effort, conducting classified research, hosting military recruiters, or maintaining ties to defense contractors. Some students protested these connections, arguing that institutions of learning should not be used to support an unjust war. Most of these campus protests involved tactics like teach-ins—informal lectures or discussions about the war—but they gradually expanded in scale and intensity.

Many students were motivated, in particular, by resistance to the draft. American men were required to carry draft cards as proof of registration, making those cards potent symbols of their relationship to the war. Beginning in 1965, some publicly burned their draft cards, even after doing so became a felony. Over time, activists moved beyond symbolic protest to direct disruption, targeting induction centers and draft boards. Catholic activists Daniel and Philip Berrigan exemplified this shift: in one protest they poured their own blood onto draft records, and in another they helped burn draft files with homemade napalm. By 1968, protests at places like Columbia University escalated into building occupations and violent confrontations with police, reflecting a broader turn toward more confrontational tactics.

As the war dragged on and American casualties mounted, skepticism spread beyond campuses. More and more reporters like David Halberstam or Neil Sheehan ventured into war zones, and they described a very different kind of conflict than government reports. For the first time, Americans could see the war unfold on television, with images of burned villages, wounded civilians, and exhausted soldiers appearing nightly in their homes. These scenes clashed with repeated claims of steady progress. The widening disconnect between official statements and on-the-ground reality became known as the credibility gap. Doubts also emerged within the political establishment itself. Some officials and members of Congress questioned whether the war could be won at an acceptable cost.

The war also became increasingly intertwined with the civil rights struggles of the era. African Americans were disproportionately drafted and sent to fight, which led many to question why they were being asked to defend freedom abroad while facing widespread discrimination at home. Many saw in the United States’ willingness to kill so many Vietnamese civilians the same kind of racism that they experienced at home. Muhammad Ali, who refused induction into the military and was stripped of his boxing title, asked “Why should they ask me to put on a uniform and go ten thousand miles from home and drop bombs on brown people in Vietnam while so-called Negro people in Louisville are treated like dogs and denied simple human rights?”¹⁵

Martin Luther King also drew a clear line between the civil rights movement at home and opposition to the war. King condemned the war for diverting resources from programs for the poor and dispossessed within the United States. The same forces sustaining segregation and poverty in the United States, he argued, were now at work in Vietnam, forming the “giant triplets of racism, extreme materialism, and militarism.” King warned that communism could not be defeated on the battlefield because its spread reflected “a judgement against our failure to make democracy real.” It would yield not to force, but to reform: to the removal of “the conditions of poverty, insecurity, and injustice” in which it takes root. Above all, the war exposed a deeper crisis of values. A nation that continued year after year, to spend more on military defense than on social uplift, he cautioned, is not merely misguided—it was “approaching spiritual death.”¹⁶

By 1967, truly massive demonstrations had emerged, including the March on the Pentagon, which drew roughly 100,000 people to Washington. Organized by a coalition of antiwar groups, the march combined peaceful protest with acts of civil disobedience, as thousands attempted to confront or occupy the Pentagon. While mostly nonviolent, clashes with police and federal marshals led to arrests and heightened national attention. Even so, the antiwar movement remained a significant but minority position. Patriotic organizations like the Veterans of Foreign Wars and the American Legion continued to support the war, arguing that withdrawal would damage American credibility and embolden communist powers. Conservative student groups like Young Americans for Freedom confronted antiwar activists on campuses. To supporters, the war remained a necessary stand against the spread of communism, even as opposition was growing louder and more visible.