it meant that the league of nations was ineffective and therefore a failure and at a lesser extent resulted in the start of ww2 for if the isa had signed it then they may have done something leading up to ww2 when hitler was taking liberties and may not have allowed it to progress as far as it did
The U.S. Senate's refusal to ratify the Treaty of Versailles significantly weakened the League of Nations, prevented the U.S. from participating in international governance, and contributed to post-war tensions in Europe, ultimately influencing the rise of World War II. This rejection also marked a shift towards isolationism in U.S. foreign policy. The consequences of the Treaty and its rejection reverberated through the subsequent decades, shaping future international relations.
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