October 25: Hungarian National Council created in Budapest under Count Mihály Károlyi of the Independence Party in coalition with Social Democrats. Council swears allegiance to the King, but declares the next day that goal is independence.

November 13: Armistice signed between Hungarian National Council and the Entente at Belgrade. Terms include that all of Hungary except Croatia would remain under Hungarian jurisdiction until the signing of the final peace treaty.

November 16: Hungarian National Council declares abolition of the Kingdom and creation of the Hungarian Republic.

November 25: Paris Peace Conference permits Czechs to occupy Slovakia, violating terms of the armistice.

November-December: Transylvania and Ruthenia declare that they will leave Hungary and join Romania and Czechoslovakia, respectively.

1919

February: Land Reform Law promulgated to break-up large estates (which control 40% of land), but its implementation is delayed over the next six months.

February 20: Communist demonstrations against the government leave six dead and sixty wounded. Communist leader Béla Kún and sixty-seven others arrested.

March 19: Workers’ councils declare the Hungarian Soviet Republic.

March 20: Károlyi government rejects an Entente ultimatum to withdraw further out of Transylvania in favor of Romania and resigns. It is replaced by coalition of Social Democrats and Communists, led by Foreign Minister Béla Kún. New government seeks to implement radical socialist measures immediately and raises new "Red" army to recapture lost territories.

April 16: Hungarian Soviet Republic begins military offensive against Romania, seeking to recapture Transylvania. April 23 similar campaign begins against Czechoslovakia, seeking to recapture Slovakia and Ruthenia. Campaign meets with initial success.

June: A French ultimatum forces the Hungarian government to stop hostilities with Romania and Czechoslovakia.

August 1: Collapse of Hungarian forces, as Romanians enter Budapest. End to Hungarian Soviet Republic.