🇺🇸ap us history review

Washington Conference of 1921

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

The Washington Conference of 1921 was an international meeting held to address the naval arms race and promote peace and stability in the Pacific region following World War I. It resulted in several treaties, including the Five-Power Treaty, which limited naval construction among the United States, Britain, Japan, France, and Italy, aiming to prevent future conflicts and maintain a balance of power in the region.

5 Must Know Facts For Your Next Test

  1. The conference included representatives from nine nations and marked the first international arms control conference.
  2. One of the significant outcomes was a ratio for battleship construction: the U.S. and Britain were allowed to have a 5:5 ratio with Japan at 3 and France and Italy at 1.75 each.
  3. The agreements made during the conference aimed to prevent an arms race in the Pacific that could lead to another global conflict.
  4. Although it was successful in promoting disarmament at sea, it did not address issues related to land-based military forces or alliances.
  5. The Washington Conference was a critical step toward establishing a framework for future international cooperation in maintaining peace.

Review Questions

  • How did the Washington Conference of 1921 impact international relations among the major powers involved?
    • The Washington Conference of 1921 significantly shaped international relations by establishing treaties that promoted disarmament and prevented an arms race among major naval powers. By limiting naval construction through agreements like the Five-Power Treaty, it fostered a sense of cooperation and reduced tensions, particularly between the United States and Japan. This collaboration set a precedent for future diplomatic engagements, emphasizing the importance of dialogue in maintaining peace.
  • Evaluate the effectiveness of the treaties signed during the Washington Conference in achieving long-term peace in the Pacific region.
    • While the treaties signed during the Washington Conference, such as the Five-Power Treaty, were effective in temporarily limiting naval expansion and fostering a spirit of cooperation among major powers, they ultimately fell short of ensuring long-term peace. The agreements did not address rising tensions over territorial disputes or military ambitions in Asia, particularly as Japan began to expand aggressively throughout the 1930s. This highlights that while diplomatic efforts were made, they were not sufficient to maintain lasting stability.
  • Analyze how the Washington Conference of 1921 reflects broader themes of interwar foreign policy and its challenges.
    • The Washington Conference of 1921 exemplifies broader themes of interwar foreign policy by showcasing attempts at multilateral diplomacy aimed at preventing conflict through disarmament. The conference revealed both optimism for cooperative security and underlying challenges, such as national interests conflicting with collective goals. Although it successfully curbed naval competition temporarily, it did not resolve deeper geopolitical tensions or address land-based military issues, ultimately foreshadowing future conflicts that would erupt as nations pursued their own agendas.

"Washington Conference of 1921" also found in: