セルビア人・クロアチア人・スロベニア人王国

The Kingdom of Yugoslavia was a country in Southeast and Central Europe that existed from 1918 until 1941. From 1918 to 1929, it was officially called the Kingdom of Serbs, Croats, and Slovenes and was colloquially known as Yugoslavia (lit. 'Land of the South Slavs') due to its origins.

The preliminary kingdom was formed in late 1918 by the unification of the Kingdom of Serbia, which was previously independent, with the Kingdom of Montenegro, and the territories of the former Austro-Hungarian Empire, mainly the provisional State of Slovenes, Croats and Serbs (encompassing what is now Bosnia and Herzegovina and most of what are now the states of Croatia and Slovenia) as well as Banat, Bačka and Baranja. The regions of Kosovo and what is today North Macedonia had become parts of Serbia prior to the unification.