The US and the United Nations · US History

Which conflict marked one of the earliest uses of UN collective security with strong U.S. involvement?

  1. The Korean War
  2. The Vietnam War
  3. The Gulf War
  4. The Spanish-American War
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Correct answer: The Korean War

During the Korean War, the United Nations authorized military action to repel North Korean aggression. The United States led the UN coalition, demonstrating early Cold War use of collective security.

Difficulty: Medium Question 5 of 20

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