Czechoslovakia became an independent state in 1918 after declaring its independence from Austria-Hungary. As a result of the Munich Agreement, the Sudetenland became part of Germany in 1938, and other territories were lost to Hungary and Poland. It ceased to exist between 1939 and 1945, as Slovakia gained independence and subsequently became part of Hungary, while the rest of the Czech Lands were incorporated into the German Protectorate of Bohemia and Moravia.
Czechoslovakia was re-established after World War II, except for Carpathian Ruthenia, which became part of the Soviet Union. Czechoslovakia split into the Czech Republic and Slovakia in January 1993.
Below are some fascinating vintage photos that show what Czechoslovakia looked like in the 1970s.