Austro-Hungarian Crisis (Das Große Vaterland)

The Austro-Hungarian Crisis was the first major conflict of the 1920's in which several breakaway nations in the former Austro-Hungarian Empire attempted to break away from the country as it transitioned to a constitutional monarchy under the United States of Greater Austria. These nations, the Hungarian Soviet Republic and the Kingdom of Serbs, Croats, and Slovenese (also known widely as Yugoslavia), were then followed by a fracture in the upper society of Greater Austria as conservatives forces, hoping to re-assert absolutist rule to quell the rebellion rose up against King Ferdinand II of Austria and his reformist government. Eventually the German Empire intervened on the side of the Greater Austria, and proved the decisive force in the war. The war lasted from 1919 when the Austro-Hungarian Imperial Council agreed to dissolve in favor of the new Constitution of Greater Austria, and ended only in 1923 when the Kingdom of Yugoslavia surrendered and the Peace of Innsbruck ended the Conservative Insurrection. The war became well known for its brutal nature, especially the high civilian casualties incurred on both sides, reaching well over 700,000 by the war's end.