Dissolution of Czechoslovakia

The dissolution of Czechoslovakia, which took effect on 31 December 1992, was the self-determined partition of the Czech and Slovak Federative Republic into the independent countries of the Czech Republic and Slovakia. Both mirrored the Czech Socialist Republic and the Slovak Socialist Republic, which had been created in 1969 as the constituent states of the Czechoslovak Socialist Republic until the end of 1989.

Source: Wikipedia — Dissolution of Czechoslovakia (CC BY-SA 4.0)