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.
Slovak koruna
Initially, the Slovak koruna was at par with the Bohemian and Moravian koruna, with 10 korunas = 1 Reichsmark. It was devalued, on 1 October 1940, to a rate of 11.62 Slovak korunas to one Reichsmark, while the value of the Bohemian and Moravian currency remained unchanged against the Reichsmark.