According to President Lyndon B. Johnson, why was the United States involved in Vietnam?

"I guess we’ve got no choice, but it scares the death out of me. I think everybody’s going to think, ‘we’re landing the Marines, we’re off to battle.’"

-President Lyndon B. Johnson, 6 March 19651

On 8 March 1965, two battalions of U. S. Marines waded ashore on the beaches at Danang. Those 3,500 soldiers were the first combat troops the United States had dispatched to South Vietnam to support the Saigon government in its effort to defeat an increasingly lethal Communist insurgency. Their mission was to protect an air base the Americans were using for a series of bombing raids they had recently conducted on North Vietnam, which had been supplying the insurgents with ever larger amounts of military aid. The raids were the first in what would become a three-year program of sustained bombing targeting sites north of the seventeenth parallel; the troops were the first in what would become a three-year escalation of U. S. military personnel fighting a counterinsurgency below the seventeenth parallel. Together, they Americanized a war the Vietnamese had been fighting for a generation.

The onset of that American war in Vietnam, which was at its most violent between 1965 and 1973, is the subject of these annotated transcripts, made from the recordings President Lyndon B. Johnson taped in secret during his time in the White House. Drawn from the months July 1964 to July1965, these transcripts cover arguably the most consequential developments of U. S. involvement in Vietnam, transforming what had been a U. S. military assistance and advisory mission into a full-scale American war. From the incidents in the Tonkin Gulf in August 1964 to the deployment of forty-four combat troop battalions in July 1965, these months span congressional authorization for military action as well as the Americanization of the conflict. In between lie incidents of increasingly greater magnitude, including the decision to deploy the Marines and the shift from defensive to offensive operations.