Answer: Austro-Hungarian, Ottoman, and Russian
Explanation: The end of the First World War can be taken as a turning point in world relations, the collapse of all the great empires, and the formation of smaller national states on the ruins of these empires. Thus, the end of the war marked the cessation of the existence of century-old multi-religious and multi-ethnic empires Austria Hungary, Ottoman and Russian.
With the cessation of the Russian Empire in almost the same territory, the Soviet Union, which was made up of the Soviet Republics, was established, with the disintegration of the Austro-Hungarian Empire, several smaller states were formed, including Yugoslavia.
In fact, Yugoslavia was formed from ethnic territories that were part of the former Austria Hungary and ethnic territories that were liberated much earlier from the Turks, i.e. the Ottoman.