I.e., what's the largest ratio of timeline maximum size/power to historical maximum size/power? Are there any countries that historically never got that large, but could have taken over huge amounts of territory with some slight changes?
To start: The Bulgarian empires were only ever regional powers, but if a few things had gone differently for the Byzantines/Ottomans, I can see them dominating the Eastern Mediterranean.
To start: The Bulgarian empires were only ever regional powers, but if a few things had gone differently for the Byzantines/Ottomans, I can see them dominating the Eastern Mediterranean.