What was the biggest fear of the American people with the league of nation in 1919?

The biggest fear of the American people regarding the League of Nations in 1919 was the potential loss of national sovereignty. Many Americans were concerned that joining the League would obligate the United States to become involved in international conflicts and entangle the nation in foreign affairs, undermining its independence. Additionally, there was skepticism about the League's effectiveness in preventing future wars, leading to a reluctance to commit to such an international organization. This fear ultimately contributed to the Senate's rejection of the treaty that established the League.