Answer: they sent troops to their borders
Explanation: About 3 million German-speak-ing people lived in the western border regions of Czechoslovakia called the Sudetenland. The mountainous region formed Czechoslovakia's main defense against the German attack. Hitler wanted to annex Czechoslovakia in order to provide more living space for Germany as well as to control its important natural resources. Hitler charged that the Czechs were abusing the Sudeten Germans, and he began massing troops on the Czech border.