Vietnam and the Limits of Superpower Intervention

The Vietnam War (1955–1975) was the Cold War's longest and most divisive conflict. It exposed the limits of American military power, shattered the Cold War consensus in US domestic politics, and demonstrated that a superpower could be defeated by a determined guerrilla movement. The key question is: why did the world's most powerful nation fail to defeat a small, impoverished country, and what does this reveal about the nature of Cold War conflict?

Key Definition: The Vietnam War refers to the conflict in Vietnam between the communist North (Democratic Republic of Vietnam, supported by the USSR and China) and the South (Republic of Vietnam, supported by the United States). American combat troops were directly involved from 1965 to 1973.

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Origins of American Involvement

American involvement in Vietnam grew incrementally through the domino theory — the belief that if one Southeast Asian country fell to communism, others would follow.

Escalation Timeline