So IOTL Schleswig-Holstein was a major point of dispute between Denmark and the German Confederation/Prussia, eventually leading
to the entire area being annexed by Prussia.
So WI (and how could) Schleswig-Holstein end up independent?
It can be annexed for a period of time (like Germany annexing territory but losing it later), but must be independent by the Modern day.
to the entire area being annexed by Prussia.
So WI (and how could) Schleswig-Holstein end up independent?
It can be annexed for a period of time (like Germany annexing territory but losing it later), but must be independent by the Modern day.