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.
Hungary–Slovakia relations
After the first break-up of Czechoslovakia in March 1939, Hungary was the first state which officially recognized the independent Slovakia. Subsequently, Hungary and Slovakia established embassies in Bratislava and Budapest and kept diplomatic relations during the World War Two. Despite a formal alliance inside the Berlin pact (1940) and a common war against the Anti-Hitler coalition, Slovak-Hungarian political relations maintained on the brink of war due to the frontier dispute and the oppression of Slovak minority in Hungary and Hungarian minority in Slovakia. The restoration of Czechoslovakia and the liquidation of the independent Slovakia in 1945 led to the end of the first period of Hungary-Slovakia's relations.