October 28 is Day of the Establishment of an Independent Czecho-Slovak State, celebrates the independence of Czechoslovakia from Austria-Hungary in 1918.
Czechoslovakia or Czecho-Slovakia was a sovereign state in Central Europe that existed from October 1918 until its peaceful dissolution into the Czech Republic and Slovakia on January 1, 1993.
From 1939 to 1945, following its forced division and partial incorporation into Nazi Germany, the state did not de facto exist but its government-in-exile continued to operate.
From 1948 to 1990, Czechoslovakia was part of the Soviet bloc with a command economy. Its economic status was formalized in membership of Comecon from 1949, and its defense status in the Warsaw Pact of May 1955. A period of political liberalization in 1968, known as the Prague Spring, was forcibly ended when the Soviet Union, assisted by several other Warsaw Pact countries, invaded.
In 1989, as Marxist–Leninist governments and communism were ending all over Europe, Czechoslovaks peacefully deposed their government in the Velvet Revolution.
In 1993, Czechoslovakia split into the two sovereign states of the Czech Republic and Slovakia.