Before the war, Austro-Hungary was under extreme strain from the fact that it was a multiculturalist's worst nightmare: it was too ethnically and culturally diverse to exist as a singular nation, mostly due to Austrian mismanagement. For example, there were 15 versions of the national anthem.
This caused problems in the Austro-Hungarian Army with 80% of their officers being German speakers. In said army, the largest ethnic groups were the Germans and the Hungarians with the rest including Ukrainians, Romanians, Slovaks and Poles making up the rest of the army. Nationalist unrest was rife throughout the army.
After the war, the Empire was broken up with territory given to the new nations of Poland, Yugoslavia and Czechoslovakia and other pre-existing nations.
But, in the event of a Central Powers victory in 1916, what would a violent, uncontrolled break up of the Austro-Hungarian Empire look like and what would be the immediate response of the nations surrounding it (especially Germany)?