Dissolution of Czechoslovakia
The Dissolution of Czechoslovakia (, ), which took effect on 1 January 1993, was an event that saw the self-determined split of the federal state of Czechoslovakia into the Czech Republic and Slovakia, entities that had arisen before as the "Czech Socialist Republic" and the "Slovak Socialist Republic" in 1969 within the framework of a federal republic.
Czech Socialist Republic
The Czech Socialist Republic ("Česká socialistická republika" in Czech; abbreviated ČSR) was a republic within the Czechoslovak Socialist Republic that is now the independent Czech Republic. The name was used from 1 January 1969 to March 1990.