El Bogus
Prince
I disagree. Berlin wasn't that important until the 18th century. To represent the western Slavs some barbs would be enough. The Polabian Slavs were (aside from the Lithuanians) the last pagans of Europe. There was even the Wendish Crusade to christianise the Slavs which didn't really succeed.Some other suggestions:
Spawn Berlin (as "Brennabor") N of the sulfur, to represent the Wends and also to make sure the Berlin exists for Prussia later.
Maybe it should be harder to get a grasp on the provinces Brandenburg and Pomerania.