Editing Serbia (section)

===Kingdom of Yugoslavia===
{{Main|Creation of Yugoslavia|Kingdom of Yugoslavia}}
The [[Corfu Declaration]] was a formal agreement between the government-in-exile of the Kingdom of Serbia and the [[Yugoslav Committee]] (anti-Habsburg South Slav émigrés) that pledged to unify Kingdom of Serbia and [[Kingdom of Montenegro]] with Austria-Hungary's South Slav autonomous crown lands: [[Kingdom of Croatia-Slavonia]], [[Kingdom of Dalmatia]], [[Slovenia]], Vojvodina (then part of the Kingdom of Hungary) and [[Bosnia and Herzegovina]] in a post-war Yugoslav state. It was signed on 20 July 1917 on Corfu.
[[File:Velika-narodna-skupstina-1918.jpg|thumb|left|upright=1.2|The [[Great People's Assembly of Serbs, Bunjevci and other Slavs in Banat, Bačka and Baranja]], the Serbian Crown Lands in [[Austria-Hungary]], (today's Vojvodina) declared unification with the [[Kingdom of Serbia]] on 25 November 1918]]
As the Austro-Hungarian Empire collapsed, the territory of Syrmia united with Serbia on 24 November 1918.<ref name="Collection of Cooper Hewitt, Smithsonian Design Museum 1914" /> Just a day later, the [[Great People's Assembly of Serbs, Bunjevci and other Slavs in Banat, Bačka and Baranja]] declared the unification of these regions ([[Banat]], [[Bačka]], and [[Baranya County (former)|Baranja]]) with Serbia.<ref>{{Cite web |url=http://www.arhivyu.gov.rs/active/en/home/glavna_navigacija/leksikon_jugoslavije/konstitutivni_akti_jugoslavije/prvodecembarski_akt.html |title=Arhiv Jugoslavije – 1 December Act, 1 December 1918<!-- Bot generated title --> |access-date=14 August 2019 |archive-date=10 May 2022 |archive-url=https://web.archive.org/web/20220510073628/http://www.arhivyu.gov.rs/active/en/home/glavna_navigacija/leksikon_jugoslavije/konstitutivni_akti_jugoslavije/prvodecembarski_akt.html |url-status=dead }}</ref>

On 26 November 1918, the [[Podgorica Assembly]] deposed the [[House of Petrović-Njegoš]] and united Montenegro with Serbia.<ref>Bojovi, Jovan, Zakonik knjza Danila, Titograd: Istorijski institut Crne Gore, 1982.––––––, Podgorič ka skupština 1918: dokumenta, Gornji Milanovac: Dečje novine, 1989.</ref> On 1 December 1918, in Belgrade, Serbian Prince Regent [[Alexander I of Yugoslavia|Alexander Karađorđević]] proclaimed the [[Kingdom of the Serbs, Croats, and Slovenes]], under King [[Peter I of Serbia]].{{sfn|Pavlowitch|2002|pp=108–109}}{{sfn|Ćirković|2004|pp=251–252}} King Peter was succeeded by his son, Alexander, in August 1921. Serb centralists and Croat autonomists clashed in the parliament, and most governments were fragile and short-lived. [[Nikola Pašić]], a conservative prime minister, headed or dominated most governments until his death. King Alexander established a [[6 January Dictatorship|dictatorship]] in 1929 with the aim of establishing the [[Yugoslavism|Yugoslav ideology]] and single [[Yugoslavs|Yugoslav nation]], changed the name of the country to Yugoslavia. The effect of Alexander's dictatorship was to further alienate the non-Serbs living in Yugoslavia from the idea of unity.{{sfn|Stavrianos|2000|p=624}}

Alexander was assassinated in [[Marseille]], during an official visit in 1934 by [[Vlado Chernozemski]], member of the [[Internal Macedonian Revolutionary Organization|IMRO]]. Alexander was succeeded by his eleven-year-old son [[Peter II of Yugoslavia|Peter II]]. In August 1939 the [[Cvetković–Maček Agreement]] established an autonomous [[Banate of Croatia]] as a solution to Croatian concerns.