This Factfile was based on the SGF flag I created a while before, I decided it needed a map to back it up.
The scenario is that Franz Ferdinand is not shot, so WW1 is avoided, and the United States of Greater Austria plan is put into place (explaining the borders of the Sudetenland). However the USGA still cannot hold together and so breaks apart after an alternate WW1 (Germany lost the casus belli of the assassination, and gradually came to see Austria was not going to provide another one what with being nicer to the minorities and all. Instead went ahead and found another way to start a war with the Entente, dragged Austria in and still lost).
Since in this scenario the Germans, specifically the Prussians, are seen much more as aggressors the southern states decided to leave the Empire and join with the newly independent Austria, creating the Southern German Federation.
The treaty that ended the war in 1919 confirmed this, and forbade the two Germanys from ever uniting (like Germany and Austria in OTL Versailles).
The 12 states of the SGF are, in order on the map;
Interestingly the Austrian state of Vorarlberg in this timeline managed to go through with its plan to join Switzerland, Liechtenstein also decides to give in now it was surrounded.