No, not at all.
So...its a mosaic earth type dealy?
Well...
Basically the series is set in a fictional generic fantasy-type world and it's our WW2, but fought by different nations. Turtledove has deliberately scrambled the languages and cultures so, for example, the 'Germans' are Italian-speaking Irishmen and the 'Jews' look Aryan. Also he uses place names from fairly obscure lands/towns in our world to represent ones in this world, e.g. Cottbus (a small town in Germany OTL) is used to represent Moscow.
He also flips north and south and east and west, so 'Finland' is a baking hot African-type country and 'North Africa' has an Antarctic climate.
I think the idea was to try and present WW2 without the reader having any preconceptions. (And of course to use fantasy things like dragons instead of aeroplanes etc.)
The map in the book is below - what BGman has done here is to try and reconcile that with an OTL map.
http://www.sfsite.com/~silverag/darkness.html