The Second Czechoslovak Republic, officially the Czecho-Slovak Republic, was a country that existed for 169 days, between 30 September 1938 and 15 March 1939, initially as a de jure unitary state that functioned as a de facto federal state before reorganizing as an asymmetrical federation in November 1938. As a federal state, it was composed of Bohemia, Moravia, Silesia and the autonomous regions of Slovakia and Subcarpathian Rus', the latter being renamed Carpathian Ukraine on 30 December 1938.