8_The Manchurian Crisis (1931–1933)

Background

  • Japan’s economy and population grew rapidly since 1900; by 1920s it was a major power.

  • The Great Depression hit Japan hard as the USA and China raised tariffs.

  • The Japanese Army believed expansion was the solution — to gain resources and markets.

I. Invasion 1 (1931)

  • 18 Sept 1931: explosion on the South Manchurian Railway near Mukden (likely staged by Japanese officers).

  • Japan blamed China and invaded Manchuria, quickly taking control.

  • Established puppet state Manchukuo under Japanese control.

  • Civilian government in Japan protested, but the military was in charge.

II. China Appeals to the League

  • China appealed for help; Japan claimed “self-defence.”

  • The League faced a major test as Japan was a key member.

III. Lytton Report (1932–1933)

  • Britain and France were reluctant to act (had colonies nearby and feared war with Japan).

  • A commission led by Lord Lytton investigated — took a year.

  • Report condemned Japan’s actions as unlawful and refused to recognise Manchukuo.

  • Japan rejected the report and withdrew from the League (March 1933).

  • The League failed to take effective action.

IV. Invasion 2 (1933)

  • February 1933: Japan invaded more of China (Jehol).

  • 24 Feb: League voted 42–1 against Japan (Japan was the only opposing vote).

  • 27 March: Japan resigned from the League and continued expansion.

League’s Response

  • Economic sanctions were discussed but not applied — USA (Japan’s main trading partner) wasn’t a member.

  • Britain and France didn’t want to risk war or lose trade.

  • Military intervention wasn’t possible — only USA and USSR had power, and both were non-members.

  • The League appeared powerless.

V. The Stimson Doctrine (1932)

  • Issued by US Secretary of State Henry Stimson.

  • Stated the USA wouldn’t recognise any treaty violating China’s territorial integrity.

  • Lacked enforcement — Japan ignored it and expanded further (attacked Shanghai 1932).

  • The US abandoned naval limitations treaties but took no military action.

VI. Consequences of the Crisis

  • Proved the League was powerless against major powers.

  • Excuses made: Japan was far away, China was unstable, etc.

  • Demonstrated the weakness of collective security.

  • Encouraged aggression — Hitler and Mussolini learned that countries could defy the League without consequence.

🔹 Paragraph Version

The Manchurian Crisis (1931–33) showed the League’s inability to handle aggression by major powers. Japan’s economic struggles after the Depression pushed its military leaders toward expansion for resources and markets. In September 1931, a staged explosion on the South Manchurian Railway gave Japan the excuse to invade Manchuria, quickly establishing the puppet state of Manchukuo. China appealed to the League, but Japan claimed self-defence. The League sent the Lytton Commission, which took a year to report that Japan had acted unlawfully and refused to recognise Manchukuo. Japan responded by withdrawing from the League in 1933 and expanded further into China.

The League’s reaction was weak — sanctions were discussed but never applied, as Britain and France feared war and the USA (Japan’s main trading partner) wasn’t a League member. The Stimson Doctrine from the USA declared non-recognition of territorial gains made by aggression, but it had no effect. Ultimately, the crisis exposed the League’s powerlessness in enforcing peace. Japan’s success without punishment encouraged dictators like Hitler and Mussolini to follow its example, marking a turning point in the decline of the League of Nations.