It symbolizes the readiness of the United States to protect
its territories with the use of force if need be. After its westward expansion, the U.S. was
now able to exert its full authority in the continent and made it clear that it
would not tolerate any interference from outside countries on its territories.
It was signed on June 28, 1919, by the Allied and associated powers and by Germany in the Hall of Mirrors in the Palace of Versailles and went into effect on January 10, 1920.
