The Dissolution of Czechoslovakia (Czech: Rozdělení Československa, Slovak: Rozdelenie Česko-Slovenska) took effect on January 1, 1993, and was the self-determined split of the federal republic of Czechoslovakia into the independent countries of the Czech Republic and Slovakia. Both mirrored the Czech Socialist Republic and the Slovak Socialist Republic, which had been created in 1969 as the constituent states of the Czechoslovak Federal Republic.
https://en.wikipedia.org/wiki/Dissolution_of_Czechoslovakia
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Also Catalonia:
The Catalan independence movement (Catalan: independentisme català;[a] Spanish: independentismo catalán) is a social and political movement (with roots in Catalan nationalism) which seeks the independence of Catalonia from Spain, along with in the movement supporting the independence of Northern Catalonia from France, and Alghero from Italy (among other Catalan-speaking areas, referred to as the Catalan Countries).
https://en.wikipedia.org/wiki/Catalan_independence_movement
Also Euskara:
The Basque conflict, also known as the Spain–ETA conflict, was an armed and political conflict from 1959 to 2011 between Spain and the Basque National Liberation Movement, a group of social and political Basque organizations which sought independence from Spain and France.
