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.
Postage stamps and postal history of Slovakia
After World War I and the dissolution of the Austro-Hungarian Empire, Slovakia and the regions of Bohemia, Moravia, and Carpathian Ruthenia formed the Czechoslovak Republic. From 1918 to 1939, stamps of the Czechoslovak Republic inscribed either "Česko-Slovensko" or "Československo" were used in Slovakia. 
Between 1939 and 1945, the Slovak Republic, a client state of Nazi Germany, issued stamps inscribed "Slovensko".