Multiple choice The vote by the United States Senate on the Treaty of Versailles (1919) demonstrated an unwillingness to join the League of Nations a commitment to collective security a belief that the nation required a stronger military a rejection of colonialism Reveal answer Fill a bubble to check yourself A Correct answer Explanation The Senate's rejection of the Treaty of Versailles was primarily driven by opposition to Article X, which would have required the US to join the League of Nations and potentially commit to collective security actions.