In March 1920 the Senate rejected the Treaty of Versailles, which would have made the U.S. a member of this
[DOC] [TLE] Senate rejects League of Nations, Nov. 19, 1919 - POLITICO [PAR] Nov 19, 2014 ... On this day in 1919, the Senate spurned the Treaty of Versailles that had ... that 
curbed the League's influence over any future U.S. decision making.