Germany violated the terms of the Treaty of Versailles on March 7 1936 by sending the German Army into an area which was supposed to remain a demilitarized zone. This area was called?

The area that Germany violated the terms of the Treaty of Versailles by sending its army into on March 7, 1936, was the Rhineland. This zone was designated as demilitarized to serve as a buffer between Germany and France, intended to prevent future conflicts. The reoccupation of the Rhineland marked a significant turning point in the lead-up to World War II, as it demonstrated Germany's defiance of the treaty and its intentions to expand militarily.