The Vietnam War lasted twenty years and resulted in the deaths of over 58,000 American soldiers, with many more Vietnamese victims. But the roots of the American-led conflict lay in the complex colonial history of Vietnam itself. Here, Pablo de Orellana uses recently declassified material to provide a new interpretation of the diplomatic failures and processes that lead to the outbreak and continuation of the conflict. Through a focus on the first Vietnam War, de Orellana shows how and why a Southeast Asian French colony already devastated by two wars came to be seen as an existential threat by policymakers in the United States, and how an attempt to stem the influence of the Soviet Union and the People's Republic of China spiraled out of control. The Road to Vietnam features new archival documents, including diplomatic notes and briefing material, to construct a new history of America's descent into conflict. This will be an essential resource for scholars and students of the Vietnam War and 20th Century diplomatic history.