The end of the Austro-Hungarian Empire was not caused by a specific country or power, but was caused by a series of complex internal and external factors and the inevitable trend of historical development.
The Austro-Hungarian Empire was originally created in 1867 by the union of the Austrian Empire and the Kingdom of Hungary. Its purpose was to counter the rise of Prussia and the independence movements of the various nationalities in the country.
However, this multi-ethnic empire has not always been stable. Within the empire, there were overly complicated ethnic relations and political conflicts, especially the desire for independence and the pursuit of equal rights among various ethnic groups.
External factors, especially the First World War, added to the crisis of Austria-Hungary. In the war, Austria-Hungary chose an alliance with Germany and Austria and did not behave well well in the advance of the war. In addition to the depletion of resources caused by the war, the national question was also exacerbated by the momentum of the war.
In November 1918, after the end of the First World War, the end of Austria-Hungary was already in sight. Since then, the Austro-Hungarian Empire has abolished the imperial system and declared its dissolution, and gradually divided into several countries.
Therefore, we cannot say who "destroyed" the Austro-Hungarian Empire, because its collapse was more due to its deep-seated internal problems and external environmental challenges. The internal political conflict, coupled with the external pressure of world war, as a complex and pluralistic empire, the disintegration of the Austro-Hungarian Empire seems to have become a historical inevitability.