a ČSR; boundaries and government established by the 1920 constitution. b Annexed by Nazi Germany. c ČSR; included the autonomous regions of Slovakia and Carpathian Ruthenia. d Annexed by Hungary (1939–1945).
e ČSR; declared a "people's democracy" (without formal name change) under the Ninth-of-May Constitution following the 1948 coup. f ČSSR; from 1969, after the Prague Spring, consisted of the Czech Socialist Republic (ČSR) and Slovak Socialist Republic (SSR). g Oblast of the Ukrainian SSR. h Oblast of Ukraine.