Despite being on the side of the victors, the Dual Monarchy suffered from internal unrest due to ethnic and linguistic tension. Years before the start of the Great War, it was proposed that a type "Federalized Monarchy" be established to placate the people. Sadly, this idea was abandoned after Franz Ferdinand was assassinated. However, Emperor Charles decided to reinvigorate the proposal and make it a reality. Sometime after the end of the First Great War, Austria-Hungary was eventually turned into a federation of states with semi-autonomous rule that was divided among ethnicities and languages. The Dual Monarchy was officially renamed into the "
United States of Greater Austria", although it was also colloquially known as the "
Austrian States", "
Greater Austria", or just "
Austria". While the Federated Monarchy did help ease the tension that it experienced before, it would still suffer rebellion from some groups of people that wanted full independence. Even after the Second Great War, there was an increasing desire, even among more peaceful states, for the majority of the states to be allowed to rule themselves completely without influence from the Hapsburgs. Emperor Charles, still alive decades after the end of the war in 1917, would entertain the idea of an amicable separation between the states that want independence through a plebiscite.
Source:
https://en.wikipedia.org/wiki/United_States_of_Greater_Austria