![Political map of Europe 09 Apr 1919 (Spectre of Communism): When [Armistice_with_Germany|the Great War ended], the Bolsheviks renounced [Treaty_of_Brest-Litovsk|their treaty with Germany] and began to reconquer the old Russian Empire. Europe was still very unstable and [Revolutions_of_1917-23|Communist revolutionaries across the continent rallied to the Bolshevik cause]. The most successful was [Hungarian_Soviet_Republic|Bela Kun in Hungary], who invaded [Czechoslovak_Republic_(1918–1938)|Czechoslovakia].](/assets/img/maps/europe/europe19190409.png)
When the Great War ended, the Bolsheviks renounced their treaty with Germany and began to reconquer the old Russian Empire. Europe was still very unstable and Communist revolutionaries across the continent rallied to the Bolshevik cause. The most successful was Bela Kun in Hungary, who invaded Czechoslovakia.