The Gulf of Tonkin Resolution escalated U.S. involvement in which country?

• A. Afghanistan
• B. Vietnam
• C. Korea
• D. Iraq

Answer: (B)

This question is about how Congress can shape war-making by authorizing the president to take broader action abroad. The Gulf of Tonkin Resolution, passed in 1964 after the Gulf of Tonkin incidents, gave President Johnson authority to “take all necessary measures” to defend U.S. forces and prevent further aggression in Southeast Asia. That broad authorization did not declare war, but it provided a legal excuse to expand U.S. military involvement in Vietnam—deploying more troops, escalating bombing campaigns, and broadening combat operations. The effect was a significant escalation of the Vietnam War, not related to Afghanistan, Korea, or Iraq, which were tied to different conflicts and time periods.