The end of communist rule in Czechoslovakia in 1989, during the peaceful Velvet Revolution, was followed once again by the country's dissolution, this time into two successor states. Slovakia and the Czech Republic went their separate ways after January 1, 1993, an event sometimes called the Velvet Divorce, but Slovakia has remained close partners with the Czech Republic, as well as with other Central European countries within the Visegrad Group. Slovakia became a member of the European Union in May 2004.