How was Hitler's Nazis reoccupiedthe Rhineland?

Nazi leader Adolf Hitler violates the Treaty of Versailles and the Locarno Pact by sending German military forces into the Rhineland, a demilitarized zone along the Rhine River in western Germany.

The Treaty of Versailles, signed in July 1919—eight months after the guns fell silent in World War I—called for stiff war reparation payments and other punishing peace terms for defeated Germany. Having been forced to sign the treaty, the German delegation to the peace conference indicated its attitude by breaking the ceremonial pen. As dictated by the Treaty of Versailles, Germany’s military forces were reduced to insignificance and the Rhineland was to be demilitarized.

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).