PRUSSIA
| Date | Clue |
|---|---|
| 2020-11-21 | Ally of Britain during the Seven Years' War |
| 2016-09-20 | German kingdom of old |
| 2011-10-11 | Otto von Bismarck's realm |
| 2008-03-02 | Realm of Otto von Bismarck |
| 2007-04-01 | King Frederick I's realm |
| 2007-03-25 | Wilhelm I ruled it |
| 2002-11-24 | Where Wilhelm I ruled |