Editing Timeline of Slovenian history (section)

== 20th century ==
{| class="wikitable" width="100%"
! style="width:6%" | Year || style="width:10%" | Date || Event
|-
| 1902 || || First telephone is mounted in Celje.
|-
| rowspan="2" valign="top" | 1907 || || Electricity is used in a lead mine in [[Mežica]].
|-
| || The Celje hall (''Celjski dom'') is built in Celje.
|-
| 1908 || || The "[[Karavanken]] railway" is built.
|-
| rowspan="2" valign="top" | 1912 || || The Preporod (''Rebirth''), a juvenile movement is established. Many members have political connections with the pro-Serb organization [[Young Bosnia]] (''Mlada Bosna'').
|-
| || A hydroelectric station in Završnica (2,500&nbsp;kW) is being built. (to 1915)
|-
| rowspan="2" valign="top" | 1913 || || Celje is [[electricity|electrified]]. Westen's dishes factory uses electricity in industry.
|-
| 12 April || [[Ivan Cankar]] in Ljubljana gives a speech ''Slovenes and Yugoslavs'' for the socialist society Vzajemnost (''Mutuality'') about Slovenes to unite politically but not culturally with other South Slavs and [[Yugoslavism]].
|-
| rowspan="2" valign="top" | 1914 || || The railway on the route Novo Mesto – [[Karlovac]] begins to run.
|-
| 28 June || Austrian Archduke [[Franz Ferdinand]], heir to the Austrian throne, and his wife [[Sophie, Duchess of Hohenberg|Countess Sophie]], are killed in [[Sarajevo]], [[Bosnia and Herzegovina|Bosnia]] at the hands of a pro-Serb nationalist assassin (a [[Bosnian Serb]] student [[Gavrilo Princip]], a member of the Young Bosnia). [[World War I]] begins.
|-
| 1915 || || The [[Soča River]] front. In 11 Soča offensives Italians captured just [[Gorizia]] (''Gorica'') and a few frontier sites. On these battlefields many Slovenes in [[Austria-Hungary|Austro-Hungarian]] army died (for example at the [[Battle of Doberdò]]). (to 1918)
|-
| rowspan="3" valign="top" | 1917 || 30 May || May Declaration of Slovene, Croatian and Serb representatives in the Vienna parliament signed by [[Anton Korošec]] about arrangement of a unified common state of Slovenes, Croats, and Serbs living within the Habsburg monarchy.
|-
| 20 July || The [[Corfu Declaration]] is signed between the Yugoslav committee (''Jugoslovanski odbor'') and the Serb government and becomes the basis for the formation of the Yugoslav state.
|-
| 24 October || The [[Kobarid|Battle of Kobarid]] between Austrian forces, reinforced by German units and the Italian army. The Italian army withdraws to the [[Piave River]], where they blocked the enemy before the arrive of the military assistance of the British and French. (to 9 November)
|-
| rowspan="8" valign="top" | 1918 || || Nitrogen factory (''Tovarna dušika'') in [[Ruše]] is built.
|-
| || A hydroelectric station Fala on the [[Drave]] river (31,150&nbsp;kW) is built.
|-
| 6 October || [[State of Slovenes, Croats and Serbs]] is established in [[Zagreb]]. It becomes the political representative body of South Slavs in Austria-Hungary.
|-
| 29 October || State of Slovenes, Croats and Serbs breaks off all relations with Austria-Hungary and proclaims a short-lived [[State of Slovenes, Croats and Serbs]]. Slovenia joins a new state with an independent State authority. The state is not recognized internationally.
|-
| 1 November || General [[Rudolf Maister]] takes over the authority of the Maribor garrison.
|-
| 3 November || Austria-Hungary surrenders.
|-
| 18 November || Germany surrenders. World War I ends.
|-
| 1 December || The State of Slovenes, Croats and Serbs joins with the [[Kingdom of Serbia]] and the [[Kingdom of Montenegro]] to form the [[Kingdom of Serbs, Croats and Slovenes]] (SHS). Today it is believed that this was a great [[historical fault]] although at that time this was probably the only sensible decision because Italy according to the London Pact with the victorious [[Triple Entente|Entente]] forces from 1915 without bias occupied Primorska, [[Istria]] (''Istra'') and [[Zadar]] in [[Dalmatia]] and Serbia was pressing for unification.
|-
| rowspan="4" valign="top" | 1919 || || The [[University of Ljubljana]] (''Univerza v Ljubljani'') is established.
|-
| 18 January || The [[Paris Peace Conference, 1919|Paris Peace Conference]] begins. [[Woodrow Wilson]] gives his "14 Points" address. The ninth and the 10th are crucial for Slovenes within former Austro-Hungarian borders.
|-
| 28 June || The [[Treaty of Versailles]] is signed between Germany and victorious three [[Triple Entente|Entente]] powers.
|-
| 10 September || [[Treaty of Saint-Germain-en-Laye (1919)|The Treaty of Saint-Germain]] with republic of Austria. It confirms the break of Austria-Hungary. Its territory comes down to newly formed countries Austria, Hungary, [[Czechoslovakia]], [[Poland]], [[Romania]], and the Kingdom of Serbs, Croats and Slovenes. [[South Tyrol]] with its German population and [[Trentino]] fall to Italy.
|-
| rowspan="6" valign="top" | 1920 || || The "Kulturbund"—a cultural and educational organization of German national minority—is established. Later becomes the nazi organization, which operates in Yugoslavia as a fifth column.
|-
| 4 June || The [[Treaty of Trianon]] with Hungary [[Burgenland]] (Gradiščansko) falls to Austria and [[Transmuraland]] ([[Prekmurje]]) to the Kingdom of Serbs, Croats and Slovenes.
|-
| 13 July || Croatian National hall in [[Pula, Croatia|Pula]] and Slovene national hall in [[Trieste]] are burned down by Italian fascists.
|-
| 14 August || A security agreement is signed between Czechoslovakia and the Kingdom of Serbs, Croats and Slovenes.
|-
| 10 October || [[Carinthian Plebiscite]].
|-
| 12 November || The Treaty of [[Rapallo]] between Italy and the Kingdom of Serbs, Croats and Slovenes, where Slovenia loses almost the whole province of Primorska, which is incorporated back again after the [[Second World War]]. Italy also gets the whole Istria together with the Trieste region (''Tržaško'').
|-
| rowspan="2" valign="top" | 1921 || 28 June || St. Vitus Day Constitution (''Vidovdanska ustava'') is adopted. It legalizes a [[monarchy|monarchal]] regulation and [[centralism]] in a new state and also the supremacy of the court and the Serb politics linked with it.
|-
| July || An allied treaty for insurance of a situation in East Europe, attained in the Paris Peace Conference, is made by Romania and the Kingdom of Serbs, Croats and Slovenes. This alliance supplements the security agreement between Czechoslovakia and the Kingdom of Serbs, Croats and Slovenes and gets the name "[[Little Entente]]".
|-
| 1922 || || [[Julian March]] (''Julijska krajina'') is incorporated to Italy.
|-
| 1923 || March || Prefect of Julian March interdicts Slovene and Croatian language at the administration.
|-
| 1925 || 15 October || Italian king issues a decree, which interdicts Slovene and Croatian language also at courts of justice.
|-
| 1927 || || Founding of the [[TIGR]] at Goriško, Slovene [[fascist|anti-fascist]] organisation, first such European organization and a secret youth organization Borba (''The fight'') at the Trieste region.
|-
| rowspan="2" valign="top" | 1929 || 6 January || The king Alexander I. with a coup d'état dissolves the parliament and establishes the 6 January Dictatorship. He abolishes the St. Vitus Day constitution, freedom of the press and the pooling rights.
|-
| 3 October || The king Alexander I renames the Kingdom of Serbs, Croats and Slovenes as the Kingdom of Yugoslavia. All political parties are prohibited.
|-
| 1930 || || Italian fascists discover some TIGR's cells and five members of TIGR (''other sources of'' Borba) are killed at [[Bazovica]].
|-
| 1931 || 9 May || To hide a dictatorship the king Alexander I. initiates the bestowal constitution, which introduces the two-chamber parliament.
|-
| 1933 || 16 February || The [[Little Entente]] formed between Romania, the Kingdom of Yugoslavia and Czechoslovakia.
|-
| rowspan="2" valign="top" | 1934 || 9 February || The [[Balkan Entente]] formed between Romania, the Kingdom of Yugoslavia, [[Greece]] and [[Turkey]].
|-
| 9 October || The king [[Alexander I of Yugoslavia|Alexander I. Karađorđević]], who reigned since 1921, is assassinated in [[Marseille]] together with a French foreign minister [[Louis Barthou]] by Croatian extremist nationalists.
|-
| 1935 || || [[Milan Stojadinović]] becomes prime minister. His government begins to drop Yugoslavia's traditional leaning toward France and starts to connect economically and politically with Germany and Italy.
|-
| 1937 || || The National Academy of Sciences and Arts is established in Ljubljana.
|-
| rowspan="3" valign="top" | 1938 || || Some members of TIGR plan an attempt on Italian Fascist leader [[Benito Mussolini]]'s life, when he visits [[Kobarid]].
|-
| 13 March || [[Adolf Hitler]] annexes Austria to the [[Nazi Germany]]. Slovenes in [[Carinthia (state)|Austrian Carinthia]] practically become German citizens.
|-
| December || [[Dragiša Cvetković]] becomes prime minister. He signs an agreement with the leader of Croatian opposition [[Vladko Maček]] allowing for the foundation of the [[Banovina of Croatia]] as the sole autonomous political and territorial unit in the Kingdom of Yugoslavia. This agreement does not solve the national problem since it just distributes the authority among Serbs and Croats.
|-
| rowspan="9" valign="top" | 1941 || 6 April || German, Italian and Hungarian occupying forces occupy Slovenia and divide it into three parts. 
|-
| 11 April || German army occupies the Central Sava Valley, where important pits, heavy industry and traffic crossroads lie.
|-
| 17 April || Royal Yugoslav army signs its surrender in [[Belgrade]].
|-
| 19 April || A Nazi politician and [[SS]] chief leader [[Heinrich Himmler]] visits Celje and among other he inspects the prison of the Stari pisker ("Old pot").
|-
| 26 April || An anti-fascist organization, the Liberation Front of Slovene nation (''Osvobodilna fronta Slovenskega naroda'') ([[Liberation Front of the Slovenian People|OF]]) is established in [[Ljubljana]]. It is active on all Slovene ethnical territory, as well in Carinthia, Primorska region in the Venetian province and Slovene [[Rába]] region (Slovene ''Slovensko Porabje'', [[Hungarian language|Hungarian]] ''Szlovén-vidék'' or ''Rába-vidék'').
|-
| 8 May || A decision about the organization of the OF in the Central Sava Valley in Trbovlje, Zagorje and [[Hrastnik]] is adopted.
|-
| July || Armed resistance begins.
|-
| 1 August || The first Slovene Partisan unit in the Central Sava Valley, the Revirje company (''Revirska četa'') is established at the Čemšeniška Alpine meadow. 70 fighters were counted.
|-
| 12 December || A battle between German policemen and Slovene partisans near the village of Rovte.
|-
| rowspan="3" valign="top" | 1943 || 1 March || [[Dolomiti Declaration]].
|-
| 16 September || The supreme plenum of OF proclaims the association of Slovene maritime province (''Slovensko primorje'') to Slovenia.
|-
| 29 November || Second session of [[AVNOJ]] in [[Jajce]].
|-
| rowspan="6" valign="top" | 1945 || 2 May || Troops of Yugoslav 4th Army together with Slovene 9th Corpus NOV, New Zealand units and Italian resistance liberate [[Trieste]].
|-
| 5 May || First postwar Slovene national government is named and elected by the SNOS ([[Slovene National Liberation Council]]) at the Bratina Hall in [[Ajdovščina]].
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| 8 May || British 8th Army together with Slovene partisan troops and motorized detachment of Yugoslav 4th Army arrives to [[Carinthia (state)|Carinthia]] and [[Klagenfurt]].
|-
| 9 May || General [[Alexander Löhr]] Commander of German Army Group E near [[Topolšica]], Slovenia signs unconditional capitulation of German occupation troops. World War II in Slovenia ends.
|-
| 25 May || Forced repatriation of Slovene military and civilians from [[Viktring]], Austria to various postwar execution sites including the [[Kočevski Rog massacre]] and the [[Teharje camp]].
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| 12 June || Trieste stops being under the administration of Yugoslav army.
|-
| rowspan="2" valign="top" | 1947 || 10 February || 21 countries sign the Paris peace conference with Italy.
|-
| 15 September || [[Free Territory of Trieste]] (STO – ''Svobodno tržaško ozemlje'') is established in Ljubljana.
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| 1948 || 18 March || [[Soviet Union]] calls back all its specialists from Yugoslavia. The [[Communist Party of the Soviet Union]] accuses the [[Communist Party of Yugoslavia]] of not being democratic, that it leans toward imperial powers, that returns to capitalism, and that it diverts from [[Marxism]]. The [[Informbiro]] begins. Economic blockade and a threat of military intervention follow.
|-
| 1954 || || Free Territory of Trieste expires after the London Memorandum is signed between the US, Great Britain, Italy and Yugoslavia. Trieste becomes Italian. Slovenia gets the north of Istria.
|-
| 1955 || || Informbiro ends. [[Josip Broz Tito]] and [[Nikita Khrushchev]] sign the Belgrade declaration, which also recognizes a Yugoslav form of socialism.
|-
| 1978 || || The "South railway" is electrified.
|-
| 1980 || 4 May || Tito dies at the [[Ljubljana University Medical Centre]].
|-
| rowspan="2" valign="top" | 1990 || 22 April || [[Milan Kučan]] wins the [[1990 Slovenian presidential election|presidential election]], which is still held within the [[Socialist Federal Republic of Yugoslavia|SFR Yugoslavia]].
|-
| 23 December || A referendum on independence is held. 88.5% of the eligible electorate (and 94.8% of the participating electorate) votes for independence from Yugoslavia.<ref name="Juberias">{{cite book |url=http://crnvo.me/docs/biblio_eng/p10.pdf |title=Legal Aspects for Referendum in Montenegro in the Context of International Law and Practice |date=November 2005 |chapter=Some legal (and political) considerations about the legal framework for referendum in Montenegro, in the light of European experiences and standards |last=Flores Juberías |first=Carlos |page=74 |publisher=Foundation Open Society Institute, Representative Office Montenegro |url-status=dead |archive-url=https://web.archive.org/web/20120426081759/http://crnvo.me/docs/biblio_eng/p10.pdf |archive-date=26 April 2012 }}</ref><ref name="STAT11">{{cite book | chapter-url=http://www.stat.si/letopis/2011/05_11/05-11-11.htm |title=Statistični letopis 2011 |trans-title=Statistical Yearbook 2011 |chapter=Volitve |trans-chapter=Elections |page=108 |publisher=Statistical Office of the Republic of Slovenia |work=Statistical Yearbook 2011 |year=2011 |volume=15 |issn=1318-5403}}</ref>
|-
| rowspan="8" valign="top" | 1991 || 25 June || Slovenia becomes an independent state by adopting and approving relevant official documents.
|-
| rowspan="2" valign="top" | 26 June || Slovenia ceremonially declares its independence from SFR Yugoslavia.
|-
| Slovenia removes Yugoslav border signs and marks its own. The [[Yugoslav People's Army]] sends 2,000 soldiers from barracks across Slovenia to reclaim all border checkpoints and the [[Slovenian War|Ten-Day War]] starts.<ref name="SAF History">{{cite web |url=http://www.slovenskavojska.si/en/about-the-slovenian-armed-forces/history/ |title=About the Slovenian Military Forces: History |publisher=Slovenian Armed Forces, Ministry of Defence |access-date=3 February 2011}}</ref>
|-
| 27 June || The Yugoslav People's Army takes over border posts, but most of their soldiers are blocked within barracks and have their water and electricity supplies cut off.
|-
| 1 July || Germany unilaterally recognizes Slovenia as an independent state.
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| 7 July || The [[Brioni Agreement]] between Slovenia and the SFR Yugoslavia is signed, under political patronage of the [[European Economic Community]] (EEC). The Ten-Day War ends<ref name="SAF History"/> and the Yugoslav People's Army is given three months to leave the territory of the Republic of Slovenia. In all, fewer than a hundred people died in the clashes, mostl of whom were Yugoslav People Army's soldiers and personnel.
|-
| 26 October || Last troops of the Yugoslav People's Army leave Slovenia.<ref name="SAF History"/>
|-
| 23 December || Independent Slovenia gets a new, democratic [[Constitution of Slovenia|constitution]].
|-
| rowspan="5" valign="top" | 1992 || 15 January || All members of the European Economic Community recognize Slovenia as a state.
|-
| 24 March || Slovenia becomes a member of the [[Organization for Security and Co-operation in Europe]].
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| 7 April || The United States recognize Slovenia as a sovereign state.
|-
| 22 May || Slovenia becomes a member of the [[United Nations]].
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| 6 December || The first [[1992 Slovenian presidential election|presidential election]] in the independent Slovenia is held and [[Milan Kučan]] becomes the first president of Slovenia.
|-
| 1993 || 14 May || Slovenia joins the [[Council of Europe]].
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| 1997 || 23 November || The second [[1997 Slovenian presidential election|presidential election]] is held, with [[Milan Kučan]] securing his second mandate.
|-
| 1998 || 1 January || Slovenia becomes a non-permanent member of the [[UN Security Council]].
|}
{{anchor|third millennium}}