<span>Because it became a hot spot for confrontation between Communist USSR and Capitalistic US.</span>
When it came to the Congress to approve the joining of the United States in the League of Nations it was blocked by the Republican opposition, especially from Senators William Borah and Henry Cabot (D).
The U. S. public opinion was still disappointed over the outcomes of the war. Also, the Republican Senators did not like what they thought to be a violation of the U.S. sovereignity: the covenant of the League in it's Article X predicted that in case of a member being attacked all the others should defend it.
This added to the historical isolationism of U.S. diplomacy stopped the country from joining the League of Nations despite its inspiration on President Woodrow Wilson’s Fourteen Points.
The answer is Meiji period also known as Meiji Restoration.
This was a major event in Japanese history that restored the Imperial rule over all of Japan. It is named after the Emperor Meiji.
The <span>Meiji period is usually defined between 1868 - 1912 which also saw nation-wide social and economic reforms.</span>
The <span>Meiji period was critical in bringing advanced learning and scientific knowledge to the Japanese society.</span>
Wait I don’t know the answer to this but good luck In’Shaa’Allah
