Wilson embarked on a nationwide tour to campaign for the treaty but was left incapacitated by a stroke in October 1919 and saw the treaty defeated in the Senate .
The treaty would have included U.S. entrance into the League of Nations .
Wilson embarked on a nationwide tour to campaign for the treaty , which would have included U.S. entrance into the League of Nations , but was left incapacitated by a stroke in October 1919 and saw the treaty defeated in the Senate .