Answer:On March 7, 1936, Adolf Hitler sent over 20,000 troops back into the Rhineland, an area that was supposed to remain a demilitarized zone according to the Treaty of Versailles. The area known as the Rhineland was a strip of German land that borders France, Belgium, and the Netherlands. This area was deemed a demilitarized zone to increase the security of France, Belgium, and the Netherlands against future German aggression. This area of Germany was also important for coal, steel, and iron production. Back in 1935, Adolf Hitler took over control of the Saar region, which was also taken away from Germany in the Treaty of Versailles to reduce the industrial capabilities of Germany.
Explanation: That is the explanation I guess