The three weakness of the treaty are as follows: The lack of the army within the league of nation, Italy and japan resentfulness of the treaty and the President Wilson's failure to get the congressional support.
Explanation:
The three major weakness of the treaty and their reasons are as follows, the shortage of army inside the nation which make them incapable for the league to hold the authority which can take proper decisions and can follow on those decisions. Unsatisfactorily of the Italy and Japan because they wanted more reward for going against the allied power at the time of World war I. To stop the united states from ratifying the treaty the congressional didn't supported the President.
