Editing 1918 (section)

=== December ===
{{main|December 1918}}
* [[December 1]]
** By the [[Danish–Icelandic Act of Union]], [[Kingdom of Iceland|Iceland]] regains independence, but remains in personal union with the [[King of Denmark]], who also becomes the King of Iceland.
** New voting laws in [[Sweden]] makes votes no longer dependent on taxable assets, each adult having one vote.
** The [[Union of Transylvania with Romania|Union of Alba Iulia]] is proclaimed: Following the [[March 27]] incorporation of [[Bessarabia]] and [[Bucovina]], [[Transylvania]] unites with the [[Kingdom of Romania]].
** The Kingdom of Serbs, Croats and Slovenes (which later becomes the [[Kingdom of Yugoslavia]]) is proclaimed, in particular ending Serbia's existence as a sovereign state for the next 87 years (it would not regain its sovereignty until 2006).<ref name="auto"/>
[[File:Flag of Yugoslavia (1918–1943).svg|thumbnail|right|Flag of the Kingdom of Serbs, Croats and Slovenes]]
* [[December 4]] – President [[Woodrow Wilson]] departs by ship to the [[Paris Peace Conference, 1919|Paris Peace Conference]], becoming the first United States President to travel to Europe while holding office.
* [[December 5]] – [[Estonian War of Independence]]: The British [[light cruiser]] {{HMS|Cassandra|1916|6}} strikes a [[naval mine|mine]] and sinks near [[Saaremaa]] in the [[Baltic Sea]], killing 11 sailors.<ref>{{cite news|url=https://www.theguardian.com/world/2010/aug/23/british-warships-cassandra-myrtle-gentian-estonia|first=Martin|last=Wainwright|author-link=Martin Wainwright (journalist)|newspaper=[[The Guardian]]|location=London|title=British warships sunk 90 years ago found off Estonian coast|date=23 August 2010|access-date=2010-08-24}}</ref>
* [[December 6]] – A [[1918 Vancouver Island earthquake|magnitude (M<sub>w</sub>) 7.2 earthquake]] shakes [[British Columbia]].
* [[December 14]] 
** [[Prince Frederick Charles of Hesse]] renounces the Finnish throne.<ref>Huldén, Anders: ''Kuningasseikkailu Suomessa 1918''. Helsinki: Kirjayhtymä, 1988. {{ISBN|951-26-2980-1}}. Page 189</ref> 
** Portuguese President [[Sidónio Pais]] is assassinated.
** [[Giacomo Puccini]]'s comic opera ''[[Gianni Schicchi]]'' premiered at the [[Metropolitan Opera]] in [[New York City]].<ref>{{cite book |title= The Puccini Problem |last= Wilson |first= Alexandra |year= 2007 |publisher= [[Cambridge University Press]] |location= Cambridge |isbn= 978-0-521-85688-1 |url= https://archive.org/details/pucciniproblemop0000wils |page=178}}</ref>
* [[December 16]] – [[Vincas Mickevičius-Kapsukas]] declares the formation of the [[Lithuanian Soviet Socialist Republic (1918–19)|Lithuanian Soviet Socialist Republic]], a [[puppet state]] created by the [[Russian Soviet Federative Socialist Republic|Russian SFSR]] to justify the [[Lithuanian–Soviet War]].
* [[December 17]] – [[Darwin Rebellion]] in Australia: Disaffected workers march on [[Government House, Darwin]], demanding the resignation of the [[Administrator of the Northern Territory]], [[John A. Gilruth]].
* [[December 20]] – [[Tomáš Garrigue Masaryk]] returns to the Czechoslovak Republic.
* [[December 21]] – [[Estonian War of Independence]]: The [[Red Army]] captures [[Tartu]], Estonia.
* [[December 25]] – ''[[Der Stahlhelm, Bund der Frontsoldaten]]'', is formed in Germany as a [[German nationalism|nationalist]] [[veteran]]s' organization.
* [[December 27]] – [[Greater Poland Uprising (1918–19)]]: Poles in [[Greater Poland]] (the former [[Grand Duchy of Posen]]) rise up against the Germans, ignited by a patriotic speech made in [[Poznań]] by pianist and politician [[Ignacy Jan Paderewski]].
* [[December 28]] – [[Sinn Féin]] enjoys a landslide victory in Irish seats in the [[1918 Irish general election|Irish general election]] (part of the [[1918 United Kingdom general election]]), following the counting of votes, winning 73 of the 105 seats in Ireland. In accordance with their [[Sinn Féin Manifesto 1918|manifesto]], Sinn Féin members will not take their seats in the [[Palace of Westminster]] but will form the [[First Dáil]] in [[Dublin]]. Countess [[Constance Markievicz]], while detained in [[Holloway Prison]] (London), becomes the first woman elected to (but does not take her seat in) the British [[House of Commons of the United Kingdom|House of Commons]].<ref>{{cite book|page=137|last=Ward|first=Margaret|title=Unmanageable Revolutionaries: Women and Irish nationalism|publisher=Pluto Press|location=London|year=1983|isbn=0-86104-700-1}}</ref>
* [[December 31]] – A British-brokered ceasefire ends the two weeks of fighting in the [[Georgian–Armenian War]].