How did the United States respond when North Vietnam attacked a US warship and sent troops to South Vietnam in the early 1960s?

After reports that North Vietnamese forces attacked a U.S. warship in the Gulf of Tonkin in 1964, Congress passed the Gulf of Tonkin Resolution. It authorized President Lyndon B. Johnson to take steps to repel attacks and prevent further aggression, allowing the United States to escalate its involvement in the conflict. Thus, Congress authorized the president to escalate the conflict.

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