It is a popular Roman what-if if Germania Magna, Marcomannia, and Sarmartia became Roman provinces. The predecent was definately there.
What would their specific borders be, though? Especially in relation to the other would-be provinces, since, for example, anyone vaguely interested in this already knows 'Elbe was the eastern border of Germania'. I'd like to know the OTHER borders. Sarmartia, especially.
I feel like I've asked this before, but checking my posts, I can't find it lately, so I'll ask again....