After World War II , about 200,000 Germans were deported to Germany according to the decree of the Potsdam Conference . Under the forced exchange of population between Czechoslovakia and Hungary , approximately 73,000 Slovaks left Hungary . After these population movements Hungary became an ethnically almost homogeneous country except the rapidly growing number of Romani people in the second half of the 20th century
Potsdam Conference
Potsdam Conference
Demographics of Hungary