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.
Czech Republic
The remaining Czech territory was occupied by Germany, which transformed it into the so-called Protectorate of Bohemia and Moravia. The protectorate was proclaimed part of the Third Reich, and the president and prime minister were subordinated to the Nazi Germany's "Reichsprotektor". Subcarpathian Rus declared independence as the Republic of Carpatho-Ukraine on 15 March 1939 but was invaded by Hungary the same day and formally annexed the next day. Approximately 345,000 Czechoslovak citizens, including 277,000 Jews, were killed or executed while hundreds of thousands of others were sent to prisons and Nazi concentration camps or used as forced labor. Up to two-thirds of the citizens were in groups targeted by the Nazis for deportation or death. One concentration camp was located within the Czech territory at Terezín, north of Prague. The Nazi "Generalplan Ost" called for the extermination, expulsion, Germanization or enslavement of most or all Czechs for the purpose of providing more living space for the German people.