Dissolution of Czechoslovakia
The Dissolution of Czechoslovakia (, ), which took effect on 1 January 1993, was an event that saw the self-determined split of the federal state of Czechoslovakia into the Czech Republic and Slovakia, entities that had arisen before as the "Czech Socialist Republic" and the "Slovak Socialist Republic" in 1969 within the framework of a federal republic.
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.