republic · Balkans and Hungary

State of Slovenes, Croats and Serbs

1918 CE – 1918 CE · capital Zagreb

Brief state of the South Slavs of Austria-Hungary, proclaimed in Zagreb in October 1918 and merged into Yugoslavia a month later.

Origins

As Austria-Hungary disintegrated, the National Council of Slovenes, Croats and Serbs in Zagreb, formed earlier in October 1918, took power. On 29 October the Croatian Sabor broke ties with Hungary and Austria, and the new state was proclaimed, covering Slovenia, Croatia-Slavonia, Dalmatia, Bosnia and Herzegovina and Vojvodina, with the Slovene politician Anton Korošec as president.

Rule and society

The state had no army and no international recognition, and its authority was weak in the countryside, where returning soldiers and peasants rioted. The Austro-Hungarian fleet at Pola was handed to it, but Italy seized Istria and parts of Dalmatia under the armistice. Svetozar Pribićević led those pushing for rapid union with Serbia.

Decline and legacy

Fearing Italian expansion, the National Council sent a delegation to Belgrade, and on 1 December 1918 the state united with the Kingdom of Serbia to form the Kingdom of Serbs, Croats and Slovenes, later called the Kingdom of Yugoslavia.

Lineage

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Cite this page
APA
The Epoch Institute. (2026). State of Slovenes, Croats and Serbs. In The Epoch Institute States Register. https://the-epoch-institute.org/state/state-of-slovenes-croats-and-serbs
MLA
“State of Slovenes, Croats and Serbs.” The Epoch Institute States Register, The Epoch Institute, 2026, https://the-epoch-institute.org/state/state-of-slovenes-croats-and-serbs. Accessed .
Chicago
The Epoch Institute. “State of Slovenes, Croats and Serbs.” The Epoch Institute States Register. 2026. https://the-epoch-institute.org/state/state-of-slovenes-croats-and-serbs.
Harvard
The Epoch Institute (2026) ‘State of Slovenes, Croats and Serbs’, The Epoch Institute States Register. Available at: https://the-epoch-institute.org/state/state-of-slovenes-croats-and-serbs (Accessed: ).

Last reviewed October 2026Random state ↻