Let's say Austria accepts Serbia's accepting almost all of Austrian demands following the the death of Franz Ferdinand. Emperor Franz Joseph II dies on schedule in 1916 and it is Charles I who has to handle the issue of renegotiating the Ausgleich.
How would Charles handle it? IIRC, he was a supporter of Austrian Trialism - the idea of establishing a third South Slavic Kingdom within Austria-Hungary.
How would Charles handle it? IIRC, he was a supporter of Austrian Trialism - the idea of establishing a third South Slavic Kingdom within Austria-Hungary.