Answer: Czechoslovakia.
Step-by-step explanation:
The Munich Conference between the leaders of Britain, France, Italy, and Germany was held on September 29-30, 1938. To obtain a promise of peace from a belligerent Hitler, they agreed to the German annexation of the Sudetenland, a border area of Czechoslovakia with an ethnic German majority.
Six months later, on March 15, 1939, Hitler broke said agreement by moving against the Czechoslovak state. Bohemia and Moravia became a German protectorate occupied by German troops, Slovakia was turned into an independent state, and Hungary took the Transcarpathian Ukraine.