Schuschnigg

Chancellor Kurt von Schuschnigg of Austria announced, “The German army is at our border with tanks and troops ready to invade Austria … Austria does not have enough capability to avert the German invasion. Resistance would accomplish nothing. It would only cause a terrible bloodbath.”

It had special facilities for politically prominent prisoners, including the former Austrian Chancellor Kurt von Schuschnigg, who opposed Nazi Germany’s annexation of Austria, anti-Nazi pastor Martin Niemoeller, and Soviet dictator Joseph Stalin’s eldest son, who died there in 1943.

When Schuschnigg asked what it was that Hitler wanted, he was handed a typed "agreement" and told that no changes would be allowed.

When Schuschnigg balked, Hitler shouted, "Fulfill my demands within three days, or I will order the march into Austria!"

Schuschnigg surrendered and returned home.