Answer;
Iron Curtain;
When Hungary opened its borders, it created a "hole" in the iron curtain.
Explanation;
Hungary was the first country to punch a hole in the Iron Curtain.
<span>This meant that many refugees from Eastern Germany who had fled to Hungary, were going to leave and move to Western Germany. They would take this trip by going through Austria (neighboring country of Hungary) to reach Western Germany. Mikhail Gorbachev was personally outraged by this, stating that Hungary had not asked him before taking this measure.</span>
The shogun empire was located at 5
