- published: 19 Dec 2015
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Austria-Hungary (also known as the Austro-Hungarian Empire, Austro-Hungarian monarchy or k.u.k. Monarchy), more formally known as the Kingdoms and Lands Represented in the Imperial Council and the Lands of the Holy Hungarian Crown of Saint Stephen, was a constitutional monarchic union between the crowns of the Austrian Empire and the Kingdom of Hungary in Central Europe. The union was a result of the Austro-Hungarian Compromise of 1867, under which the House of Habsburg agreed to share power with the separate Hungarian government, dividing the territory of the former Austrian Empire between them. The Austrian and the Hungarian lands became independent entities enjoying equal status. Austria-Hungary was a multinational realm and one of the world's great powers at the time. The dual monarchy existed for 51 years until it dissolved on 31 October 1918 before a military defeat on the Italian front of the First World War.
The realm comprised modern-day Austria, Hungary, Bosnia and Herzegovina, Croatia, the Czech Republic, Slovakia, Slovenia, large parts of Serbia and Romania and smaller parts of Italy, Montenegro, Poland and Ukraine.
World War I (WWI), which was predominantly called the World War or the Great War from its occurrence until 1939 (World War II), and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918. It involved all the world's great powers, which were assembled in two opposing alliances: the Allies (based on the Triple Entente of the United Kingdom, France and Russia) and the Central Powers (originally centred around the Triple Alliance of Germany, Austria-Hungary and Italy; but, as Austria–Hungary had taken the offensive against the agreement, Italy did not enter into the war). These alliances both reorganised (Italy fought for the Allies), and expanded as more nations entered the war. Ultimately more than 70 million military personnel, including 60 million Europeans, were mobilised in one of the largest wars in history. More than 9 million combatants were killed, largely because of enormous increases in lethality of weapons, thanks to new technology, without corresponding improvements in protection or mobility. It was the sixth-deadliest conflict in world history, subsequently paving the way for various political changes such as revolutions in the nations involved.