Germany is often seen as the place where nationalism failed. While the Western & Southern Slavs, Scandinavians, Italians and people of the Benelux united, Germany was to busy with internal struggles to ever become a single country. Even so many German states are quite important economic powers, Bavaria, Prussia, Hannover ect can all rival much larger nations when it comes to GDP.
This of course poses the question, what if Germany was a united country? What would need to change to make it happen? And just how powerful would such a country be?
No ASB like Germany conquering most of Europe in like a year though, keep it realistic.