Answer:
the split of Austria-Hungary
Explanation:
The Austro-Hungarian Empire, or simply Austria-Hungary, was a European state created in 1867 after the so-called Austro-Hungarian Compromise, which equated the status of the Kingdom of Hungary with that of the Austrian Empire, both under the same monarch. The full official name of the Empire is translated as: "The Kingdoms and Territories represented in the Imperial Council and the Territories of the Hungarian Holy Crown of Saint Stephen".
In 1914, on the eve of the First World War that would lead to its dissolution, the Empire had an extension of 675 936 km² and a population of 52 800 000 inhabitants, being considered one of the great European and world powers, standing out especially for its cultural, artistic and intellectual prestige.
After the defeat in the First World War, various national movements emerged that promoted the dissolution of the Empire and the formation of nation-states that welcomed the diverse ethnic groups existing in the region. In 1919, Austria-Hungary was dissolved, giving rise to the German states of Austria, the Kingdom of Hungary, Czechoslovakia, the Free State of Fiume and the State of the Slovenes, Croats and Serbs, while some regions were annexed by neighboring countries .
