Vietnam War and Protest Movements · US History

The Gulf of Tonkin Resolution (1964) fundamentally changed the U.S. role in Vietnam by:

  1. Formally declaring war on North Vietnam
  2. Authorizing the President to take all necessary measures to repel armed attacks
  3. Limiting the President's ability to send ground troops without a formal draft
  4. Ending the advisory phase and withdrawing all U.S. personnel
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Correct answer: Authorizing the President to take all necessary measures to repel armed attacks

The resolution granted President Lyndon B. Johnson broad military powers without a formal declaration of war by Congress. This led to a rapid escalation of U.S. involvement in the conflict.

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