Open Door Policy · US History

The 'Nine-Power Treaty' signed at the Washington Naval Conference (1922) effectively:

  1. Abolished the Open Door Policy
  2. Divided China into nine equal colonies
  3. Banned the United States from trading with any Asian nation
  4. Formalized the Open Door Policy into international law
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Correct answer: Formalized the Open Door Policy into international law

The treaty was a peak for the Open Door principles, with nine nations agreeing to respect the sovereignty and territorial integrity of China. It was an attempt to stabilize East Asia and prevent further imperialist competition.

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