After World War II, Czechoslovakia was reconstituted and Jozef Tiso was executed in 1947 for collaboration with the Nazis. More than 80,000 Hungarians and 32,000 Germans were forced to leave Slovakia, in a series of population transfers initiated by the Allies at the Potsdam Conference. Out of about 130,000 Carpathian Germans in Slovakia in 1938, by 1947 only some 20,000 remained. The NKVD arrested and deported over 20,000 people to Siberia