January 6 – Czech representatives of the Imperial Diet call for a unified Czechoslovakia[2]
January 8 – Wilson's 14 Points, demands "The people of Austria-Hungary, whose place among the nations we wish to see safeguarded and assured, should be accorded the freest opportunity to autonomous development"; Hungarian papers publish it on January 10[3]
Wilson answers to Austro-Hungarian peace offer, claiming that with the recognition of Czechoslovakia, peace on the basis of the 14 points is no longer sufficient, demands the recognition of a Czechoslovak and Yugoslav state[16]
October 22 - István Tisza dissolves the National Party of Work
October 24 – November 4 – Battle of Vittorio Veneto, the Italian Front collapses
October 23
The last session of Parliament before the revolution[17]
Soldiers' Council negotiates with unions plotting an insurrection scheduled November 4[19]
Common foreign minister Gyula Andrássy accepts armistice on Entente terms, thereby indirectly recognizing Czechoslovak and Yugoslav independence[22]
October 28
Battle of Chain Bridge
Czechoslovakia declares independence
Army of the Danube (AD) is separated from the Armée d'Orient advancing northwards. It is tasked to operate in Romania and the Crimea, led by Henri Mathias Berthelot.
October 29
Slovak National Council declares independence in Turócszentmárton (St. Martin)
State of Slovenes, Croats and Serbs declared in Zagreb
Hungarian administration flees Fiume
Charles IV appoints János Hadik as Prime Minister
Police in Budapest defects to the National Council[23]
October 30
10:00: Third Wekerle Government dissolved, János Hadik takes his oath, starts to work on assembling his government
Protests escalate into the Aster Revolution
Miklós Horthy ordered to hand over the Austro-Hungarian fleet
Deserters (mostly Romanian) besiege the Urmánczy mansion in Jósikafalva (Beliș). Nándor Urmánczy recruits a private detachment and crushes the rioters, shoots 20 prisoners[33]
Eckartsau Letter: King Charles IV withdraws from all state affairs and recognizes Hungary's future form of government
Oszkár Jászi negotiates with the Romanian National Council in Arad (to November 14)[20]
Viktor Heltai's National Guard squad is removed from Budapest to relieve Czech attacks around Pozsony (now Bratislava).[36] Nagyszombat (now Trnava) is recaptured.
November 15
Hungarian National Defense Association (MOVE) founded[4]
General meeting of the Székely National Council, proposal for a Székely Republic
Franchet d'Esperey allows Romania to advance to the Belgrade Armistice line[41]
November 18 German-Austria declares its territorial demands for the German-inhabited areas of Pozsony, Moson, Sopron, and Vas counties;[42] in response, Hungary decides to cease food shipments
November 19 – Ruthenian National Council issues a memorandum to Oszkár Jászi
November 20 – Romanian National Council in Arad demands total independence[43]
November 21 – Austrian Foreign Minister Otto Bauer and Hungarian foreign secretary József Diner-Dénes agree to resume Hungarian food shipments in exchange for ceasing pro-Austrian agitation in Western Hungary[44]
November 22 – Law 41/1918 in German Austria re-affirms Austrian territorial claims to Western Hungary[45]
November 23 – No. I of 1918 People's Law expands the franchise to 50%.[4] Universal male suffrage above 21 and female suffrage for literates above 24.
November 24 – Hungarian Party of Communists (KMP) established[4]
November 25
Serbs of Vojvodina declare for Serbia at Újvidék (now Novi Sad)[46]
Fernand Vix arrives to Budapest as the head of the Budapest Allied Military Mission to oversee a French occupation of Hungary which would never be implemented[47]
Austrian-Hungarian trade agreement: Hungary provides cereals and animals in exchange for paper, medicine and industrial products[48]
November 26 - Gang leader Viktor Heltai is arrested[49]
November 28 - Székely and Transylvanian Hungarian National Assembly in Marosvásárhely (now Târgu Mureș)[46]
December
December 1
A council of Transylvanian Romanians declare union 26 counties of the Kingdom of Hungary until the Tisza river with Romania in Gyulafehérvár (now Alba Iulia)
State of Slovenes, Croats and Serbs unifies with Serbia
Székely Division established
December 2 – Romanians enter Marosvásárhely (now Târgu Mureș)[50]
December 3 – A note by Vix demands Hungarian withdrawal from "Slovakia", but does not specify a border
December 5–7 – Republic of Heinzenland in Burgerland
December 6
Bartha-Hodža Agreement – Minister of Defense Albert Bartha and Slovak politician Milan Hodža agree on a demarcation line, which is later rejected by Czech leaders
December 7 – First issue of KMP's newspaper Vörös Újság published[52]
December 8 – István Apáthy named High Government Commissioner for Eastern Hungary[53]
December 9 – During the assembly of the Upper Hungarian German National Council seated in Késmárk (now Kežmarok), the plan for establishing an independent Zipser ('Spiš') Republic was presented. However, the republic was never proclaimed.[54]
December 10 – First French troops arrive to Szeged; they are reinforced by the 157th Inf. Regiment on December 30, and the 210th Inf. Regiment on January 3, 1919[55]
December 11 – Slovak People's Republic declared
December 12 – Protest by the Soldiers' Council forces defense minister Albert Bartha to resign. Minister of the Interior Tivadar Batthyány also resigns, replaced by Vince Nagy. With that, the overall balance of the Károlyi government shifts leftwards. Károlyi himself fills the defense position provisionally, alongside Vilmos Böhm.
December 15 – Romanians cross the Belgrade armistice line
Ablonczy, Balázs (2020). Ismeretlen Trianon. Az összeomlás és a békeszerződés.
Borsányi, Gy. (1988). Októbertől márciusig. Kossuth Könyvkiadó.
Breitt, J. (1925). A magyarországi 1918/19. évi forradalmi mozgalmak és a vörös háború története.
Demkó, A. (2020). Napról napra Trianon - 1918-1924. Gyulai, G. Reakció Kiadó Kft.
Gulyás, László (2021). A Magyar Királyság román megszállásának szakaszai, különös tekintettel a Partium és a Tiszántúl elfoglalására. Lokális Trianon 1. : Csongrád, Csanád és Torontál vármegye az összeomlás éveiben 1918–1920. Vol. 28. pp. 27–41.
Gusztáv, G. (1992). A forradalmak kora: Magyarország története: 1918-1920. Magyar Szemle Társaság.
Hatos, Pál (2018). Az elátkozott köztársaság: az 1918-as összeomlás és az őszirózsás forradalom története.
Juhász, Gyula (1976). Magyarország története 8/1-2: 1918-1919/1919-1945. Pach, Z. P., Ránki, G., Hajdu, T., Berend, T. I., & Tilkovszky, L. Budapest.((cite book)): CS1 maint: location missing publisher (link)
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