1933 Japan Leaves League of Nations

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Chinese addressing League of Nations 1933

The League of Nations received a report from its Commission of inquiry convened under the Earl of Lytton. The Commission found that Japanese actions could not be justified as an act of self-defense. Furthermore, the report stated that the creation of Manchukuo did not result from a "genuine and spontaneous independence movement." The League adopted the American policy of non-recognition of any conquest. The result: the Japanese announced that they were withdrawing from the League.
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In the 1920s and early 1930s, Japan faced significant economic and social challenges. The Great Kanto Earthquake of 1923, the Great Depression of 1929, and the rising unemployment and social unrest that followed, all contributed to a political shift towards militarism and ultra-nationalism. As Japan's economy and society struggled, its leaders increasingly sought to solve these problems through territorial expansion in Asia, particularly in China and Manchuria.

This ambition became evident in 1931 when Japan staged the Mukden Incident, a false flag operation that provided a pretext for the invasion of Manchuria. The League of Nations condemned the invasion, but failed to take decisive action, highlighting its inherent weaknesses and further alienating Japan. The establishment of the puppet state of Manchukuo in 1932 further intensified tensions between Japan and the League.

The breaking point came in 1933 when the League of Nations adopted the Lytton Report, an investigation into the Manchurian crisis. The report condemned Japan's actions in Manchuria and called for the withdrawal of Japanese troops and the restoration of Chinese sovereignty. However, it also criticized China's inability to maintain order in the region, suggesting that some form of international supervision was necessary.

Japan viewed the Lytton Report as a biased, hypocritical, and an infringement on its sovereignty. In response, the Japanese delegation walked out of the League of Nations' assembly in February 1933. In March, the Japanese government officially announced its withdrawal from the organization, citing the League's unjust treatment and the need for Japan to protect its interests in Asia.

Japan's exit from the League of Nations had several significant consequences. Firstly, it dealt a severe blow to the credibility and effectiveness of the League. The withdrawal of a founding member, particularly one as influential as Japan, underscored the League's inability to enforce its mandates and maintain global peace. This failure would later contribute to the League's ultimate dissolution in 1946.

Secondly, Japan's withdrawal signaled a more aggressive and expansionist foreign policy. Emboldened by the League's ineffectiveness, Japan continued its invasion of China, eventually leading to the Second Sino-Japanese War in 1937. The conflict further strained relations with Western powers, particularly the United States, and culminated in the attack on Pearl Harbor and Japan's entry into World War II in 1941.

Finally, Japan's decision to leave the League of Nations contributed to the development of a more isolationist and militaristic mindset within the country. Japanese leaders came to believe that they could not rely on international institutions to protect their interests and instead focused on building a powerful military to achieve their goals.