A wolf and a penguin could never live together, nor could a camel and a hippopotamus. That would be absurd.
And the older you get, the fewer things you really love. And by the time you get to my age, maybe it's only one or two things. With me, I think it's one.
You got me interested & the rules were readily available so I had a quick read through.
I found this which seems to make the situation pretty clear & different to how the areas are the Mediterranean Sea works in Struggle of Empires.
*Each ship on a card adds one point in combats in the Colonies, the Baltic, and Mediterranean areas.
Since there is no mention of Central Europe, Germany or the Ottoman Empire I think you are correct.