What League of Nations do after Japan invaded China?

After Japan invaded China in 1937, the League of Nations condemned the aggression but struggled to take effective action. The League set up a commission, led by British diplomat Lord Lytton, to investigate the situation, which ultimately concluded that Japan's actions were unjustified. However, Japan withdrew from the League in 1933, rendering the organization unable to enforce any measures against its aggression. This failure highlighted the League's limitations in maintaining peace and security in the face of growing militarism.