On 19 March 1920, the US Senate rejected the Treaty of Versailles for the second time, ensuring that the United States would not join the League of Nations.
Despite President Woodrow Wilson’s fervent advocacy for the treaty as a cornerstone of global peace, opposition led by Senator Henry Cabot Lodge argued that membership in the League would entangle the nation in future European conflicts.
This decisive rejection reaffirmed America’s commitment to isolationism in the postwar era, signalling a reluctance to engage in collective security agreements.
The absence of the US weakened the League from its inception, foreshadowing its struggles in preventing future global conflicts.
