Dissolution of Czechoslovakia
Since the federalization in 1968, Czechoslovakia had divided citizenship, either of the Czech Socialist Republic or of the Slovak Socialist Republic (the word 'Socialist' was dropped from both names shortly after the Velvet Revolution). This distinction, however, had little effect on the citizen's life. On January 1, 1993, all Czechoslovak citizens automatically became citizens either of the Czech Republic or the Slovak Republic, based on their previous citizenship, permanent residence address, birthplace, family ties, job, and other criteria. Additionally, people had one year's time to claim the other citizenship under certain conditions.
History of the Czech lands
The Kingdom of Bohemia officially ceased to exist in 1918 when the Czecho-Slovak Republic was declared, a merger of the lands of the Bohemian Crown, Slovakia, and Carpathian Ruthenia. Czechoslovakia before WW2 remained the only democracy in central and eastern Europe.