The triumph of revolution in Russia in 1917 brought an end to the 300-year old Romanov dynasty and the empire over which it ruled
The collapse of the German, Austrian and Ottoman war effort in 1918 precipitated the end of the remaining continental European empires.
In each instance, imperial dissolution went hand in hand with the formation of new states.
The Russian Civil War, between 1918 and 1921, led to an exodus of people who opposed the Bolsheviks who had seized power in November 1917.
In Europe’s new nation states, minority ethnic…