Re: Wilhelm, forgot to include a historical quote the movie didn't use, when he was urged to abdicate: "No descendant of Frederick the Great would ever abdicate!" (He really said "Nachkomme" - descendant - rather than "Nachfolger" - successor.) Willy, unless you're postulating Fritz was getting it on with his sister-in-law, you're not his descendant.

Map problems: yes, I can see how imprinting on late 18th century borders would have been confusing. :)