Slovakia
The Slovak Republic and the Czech Republic went their separate ways after 1 January 1993, an event sometimes called the Velvet Divorce. Slovakia has remained a close partner with the Czech Republic. Both countries co-operate with Hungary and Poland in the Visegrád Group. Slovakia became a member of NATO on 29 March 2004 and of the European Union on 1 May 2004. On 1 January 2009, Slovakia adopted the Euro as its national currency.
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.