What was the role of the United States in foreign affairs starting with the Treaty of Versailles through the 1990s?

The United States of America backed up the allied powers and they influenced in the decision making of Treaty of Versailles.

Explanation:

The Treaty of Versailles took place in 1919. It took place after the first World War in Paris. The treaty was between the allied powers and Germany. As of the treaty, Germany lost 75 percent of its iron reserves, 13 percent of population and 26 percent of coal to France, Lithuania and many other neighbouring countries. The allied powers also controlled Rhineland for much of the 1920s. The United States of America entered World War 1 in the late 1917. It backed up the allied powers.