The League of Nations was to be a place where two or more governments could come and attempt to solve their problems.
The League of Nations had no power to become involved without being invited and most nations chose not to be involved with or ask for help from the League of Nations.
The United States never agreed to become a part of the League of Nations.
France and Britain became its two most important members.
The League of Nations lost most of its power and importance by the early 1930’s and in 1939, World War II began.