What major historical event caused the force mass-migration of people in Document #3

How was hitler able to take control of czechoslovakia? ? a) czechoslovakia was forced to break its alliance with france & the soviet union to appease hitler b) without resistance, he extended his control of the sudetenland to include all of czechoslovakia c) the czechs reluctantly agreed to provide “lebensrum, or living space to the germans d) he was given czechoslovakia by great britain and france in keeping with the policy of containment. appreciate the