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.
Slovaks
The territory of present-day Slovakia was split in two parts between the Kingdom of Hungary (under Hungarian rule gradually from 907 to the early 14th century) to Upper Hungary and Royal Hungary (under the Habsburgs from 1527 – 1848 (see also Hungarian Revolution of 1848)) until the formation of Czechoslovakia in 1918. However, according to other historians, from 895 to 902, the whole area of the present-day Slovakia became part of the rising Principality of Hungary, and became (without gradation) part of the Kingdom of Hungary a century later. A separate entity called Nitra Frontier Duchy, existed at this time within the Kingdom of Hungary. This duchy was abolished in 1107. The territory inhabited by the Slovaks in present-day Hungary was gradually reduced.