Footnotes to history: nations that no longer exist, including the land of my ancestors:
Belorussian Democratic Republic- After the October Revolution, many Russian political parties opposed to the Bolsheviks were forced into exile or into areas controlled by White forces. The Social Revolutionary Party managed to hold onto control in Belorussia (now Belarus). On March 25, 1918, after the Social Revolutionaries broke with the Bolsheviks, Belorussia was declared independent. Unfortunately, the SR government had little army support, and the region was quickly overrun by Communist forces.
(Thanks, Stefan!)