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.
Second Czechoslovak Republic
The Second Czechoslovak Republic (, ), sometimes also called the Czech-Slovak Republic (Czech and ), existed for 169 days, between 30 September 1938 and 15 March 1939. It was composed of Bohemia, Moravia, Silesia and the autonomous regions of Slovakia and Subcarpathian Ruthenia, the latter renamed as of 22 November 1938 as Carpathian Ukraine ("Karpatská Ukrajina" in Czech).