The correct answers are:
- Signed treaties to limit naval arms
- Turned to Isolationist Policy regarding foreign relations
The refusal of the American Senate to sign the Treaty of Versailles and the Covenant of the League of Nations is the most famous and important example of American isolationism.
For the United States to adhere to both treaties it was necessary for the Senate to ratify them by a two-thirds majority. Democratic President Wilson, who had to face a Senate with a Republican majority since 1918, sinned in confidence and took it for granted that he would get the camera's approval. Wilson, who suffered a stroke that forced him to stay at home three months in full debate of the issue, refused to agree to any amendment to the treaties with the Republican leader in the Senate Foreign Affairs Committee, Henry Cabot Lodge When, indeed, his proposal was defeated in the Senate, Wilson thought that a Democratic victory in the elections that were due to be celebrated in 1920 would allow the definitive ratification of the treaties. However, Wilson had lost contact with the American reality, the victory of the Republican candidate, Harding, led to the US definitively reject the Treaty of Versailles and the League of Nations. In August 1921, the Washington government separately signed peace treaties with Germany, Austria and Hungary.
From that moment on, the task of supervising the implementation of the Treaty of Versailles became infinitely more difficult. France and Great Britain, often confronted, with the little help from Belgium and Italy, were alone in implementing a treaty that had been negotiated between the victors assuming full American participation.
However, the US policy during the 1920s can not be qualified as fully isolationist, since it was actively involved in issues such as arms control or war reparations (Plan Dawes)