AHCWI: North Germany and South Germany

With a POD before 1900, and preferably before the German Wars of Unification (which preferably should be butterflied), have Germany divided into North Germany and South Germany.

Would like scenarios for both where North Germany and South Germany are friendly with each other, and where North Germany and South Germany are hostile to each other.

What would be the results on international diplomacy, history, and German nationalism of such a division, and with whom would these countries ally with and be enemies with?
 
Could a south Germany form under Austria, and a North Germany under Prussia?

That's the usual 'default' scenario, though I think it requires Hungary to be independent IMO.

You could also do things with a Bavarian led SG and a Hannoverarian/Saxon led NG depending on how things shape up.
 
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