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.
World War II by country
The newly separated Slovak Republic (1939–1945), led by Jozef Tiso was set up in Slovakia. Part of southern Slovakia and all of Ruthenia (the former eastern end of Czechoslovakia) was annexed by Hungary. Zaolzie was annexed by Poland, snatched from them by the Germans 11 months later, and returned to Czechoslovakia in 1945 by the Soviet Union. The Slovak National Uprising, commenced in August 1944, was suppressed by German forces at the end of October; partisans, however, continued fighting in the mountains until the war's end. In April 1945, the Red Army defeated the Germans and ousted Tiso's government, annexing Carpathian Ruthenia to the USSR.