The Vietnam War was a long, costly and divisive conflict that pitted the communist government of North Vietnam against South Vietnam and its principal ally, the United States. The conflict was intensified by the ongoing Cold War between the United States and the Soviet Union. More than 3 million people (including over 58,000 Americans) were killed in the Vietnam War, and more than half of the dead were Vietnamese civilians. 

​

According to a survey by the Veterans Administration, some 500,000 of the 3 million troops who served in Vietnam suffered from post-traumatic stress disorder, and rates of divorce, suicide, alcoholism and drug addiction were markedly higher among veterans.

By 1962, the U.S. military presence in South Vietnam had reached some 9,000 troops, compared with fewer than 800 during the 1950s.

​

In August of 1964, after DRV torpedo boats attacked two U.S. destroyers in the Gulf of Tonkin, Johnson ordered the retaliatory bombing of military targets in North Vietnam. Congress soon passed the Gulf of Tonkin Resolution, which gave Johnson broad war-making powers, and U.S. planes began regular bombing raids, codenamed Operation Rolling Thunder, the following year.

​

In March 1965, Johnson made the decision—with solid support from the American public—to send U.S. combat forces into battle in Vietnam. By June, 82,000 combat troops were stationed in Vietnam, and military leaders were calling for 175,000 more by the end of 1965 to shore up the struggling South Vietnamese army.

​

Johnson authorized the immediate dispatch of 100,000 troops at the end of July 1965 and another 100,000 in 1966. In addition to the United States, South Korea, Thailand, Australia and New Zealand also committed troops to fight in South Vietnam (albeit on a much smaller scale).

​

In contrast to the air attacks on North Vietnam, the U.S.-South Vietnamese war effort in the south was fought primarily on the ground, largely under the command of General William Westmoreland, in coordination with the government of General Nguyen Van Thieu in Saigon.

​

On January 31, 1968, some 70,000 DRV forces under General Vo Nguyen Giap launched the Tet Offensive (named for the lunar new year), a coordinated series of fierce attacks on more than 100 cities and towns in South Vietnam.

​

Reports of the Tet Offensive stunned the U.S. public, however, especially after news broke that Westmoreland had requested an additional 200,000 troops, despite repeated assurances that victory in the Vietnam War was imminent. With his approval ratings dropping in an election year, Johnson called a halt to bombing in much of North Vietnam (though bombings continued in the south) and promised to dedicate the rest of his term to seeking peace rather than reelection.

​

In January 1973, the United States and North Vietnam concluded a final peace agreement, ending open hostilities between the two nations. War between North and South Vietnam continued, however, until April 30, 1975, when DRV forces captured Saigon, renaming it Ho Chi Minh City (Ho himself died in 1969).

​

In the United States, the effects of the Vietnam War would linger long after the last troops returned home in 1973. The nation spent more than $120 billion on the conflict in Vietnam from 1965-73; this massive spending led to widespread inflation, exacerbated by a worldwide oil crisis in 1973 and skyrocketing fuel prices.

​

Psychologically, the effects ran even deeper. The war had pierced the myth of American invincibility and had bitterly divided the nation. Many returning veterans faced negative reactions from both opponents of the war (who viewed them as having killed innocent civilians) and its supporters (who saw them as having lost the war), along with physical damage including the effects of exposure to the toxic herbicide Agent Orange, millions of gallons of which had been dumped by U.S. planes on the dense forests of Vietnam.

In 1982, the Vietnam Veterans Memorial was unveiled in Washington, D.C. On it were inscribed the names of 57,939 American men and women killed or missing in the war; later additions brought that total to 58,200.

​