At first, in October 1938, Heydrich sent the "Einsatzgruppen" to the Sudetenland. Adolf Hitler, the leader of Nazi Germany, wanted to take over the Sudetenland. He was ready to use the Nazi military to invade the area. However, in the Munich Agreement, world powers agreed that Hitler could have the Sudetenland. The "Einsatzgruppen" helped take over government buildings, and took all the government papers they could find. They also arrested about 10,000 Czech communists and German citizens.