What was a significant outcome of the Lytton Commission regarding Japan's actions in Manchuria?

The significant outcome of the Lytton Commission regarding Japan's actions in Manchuria was that it found Japan guilty but took too long to act. The Commission was established in 1931 by the League of Nations in response to Japan's invasion of Manchuria, and it ultimately concluded that Japan had acted aggressively and had violated international norms.

While the Commission's report condemned Japan's actions, the League of Nations was unable to take immediate and effective measures to enforce its findings or to impose meaningful sanctions against Japan. This delay and lack of decisive action highlighted the weaknesses of the League of Nations and contributed to Japan's continued militarism and aggression in the region. The Commission's findings did not lead to substantial consequences for Japan at the time, allowing the situation in Manchuria to continue without intervention.

The other options do not accurately reflect the outcomes of the Lytton Commission. There were no immediate sanctions imposed on Japan, nor did it receive economic aid or see a mobilization of US military forces against it following the findings of the Commission.