Put Europe, but also include Asia.

It would be impossible to do a detailed map from Europe to the Americas to Asia.

I'd personally be excited for the Amercias because then thanks to alternate history, we can have Aztecs conquering Europe.

City battle maps MUST NEED VARIATION. I CANNOT STRESS THE IMPORTANCE OF THIS. I DO NOT WISH TO PLAY COPY PASTE MAPS AND MEDIUM CITY SIZED SETTLEMENTS. IF THAT IS FUN THEN NO IT ISN'T.

They must do it in an Empire format. That way the maps don't collide with each other in many respects.