Final answer:
The Sudetenland was a region in northwestern Czechoslovakia with a significant German minority. Its significance lies in the international crisis it created in 1938 and the failure of the Munich Conference to prevent German occupation of the rest of Czechoslovakia.
Step-by-step explanation:
The Sudetenland was a region in northwestern Czechoslovakia with a significant German minority. It was inhabited largely by German speakers and bordered Germany and Poland. The significance of the Sudetenland lies in the international crisis it created in 1938 when Germany threatened to intervene and annex the region. This crisis led to the Munich Conference where British and French leaders agreed to allow Germany to annex the Sudetenland in an attempt to avoid war. However, this appeasement policy ultimately failed as Germany went on to occupy the rest of Czechoslovakia in 1939.