 After World War II the Germans were expelled from Czechoslovakia.Influenced by Edvard Beneš, the British Government refused to allow Jaksch's return to Western Germany until 1949.In 1949 he became responsible for Refugee affairs in the Social-Democratic Party of Germany, in 1950-53 he became director of the Hessian State Office for Expellees, Refugees and Evacuees, and in 1951 he founded the "Seliger-Gemeinde", an Association of Sudeten German Social Democrats.