USA HISTORY

Detailed explanation-1: -The credibility of the organization was weakened by the fact that the United States never joined, and Japan, Italy, Germany and Spain quit.

Detailed explanation-2: -Despite formulating the concept and signing the Covenant, the United States never joined the League of Nations, and some relatively-isolated sovereign states in Asia also did not join, including Saudi Arabia, Yemen, Mongolia, Nepal, and Bhutan.

Detailed explanation-3: -Russia was expelled out of League of Nations for invading Finland and USA never joined the league, ironic because it was America who designed it and these were the two major countries who were not members of League of Nations. Was this answer helpful?

Detailed explanation-4: -September 18, 1934 general meeting of the League of Nations adopted a resolution on the admission of the USSR into the League and the inclusion of its representative to its Board as a permanent member.

Detailed explanation-5: -Germany was not an original member of the League of Nations when it was established in 1920. Germany joined in 1926 and remained a member until Adolf Hitler withdrew the country from the League in 1933.