The separate administration of the Saxon and Prussian parts of the station continued even after World War I and the establishment of the nationwide Deutsche Reichsbahn railway organisation in 1920. Not until 1934 Leipzig Hauptbahnhof as a whole was assigned to the Reichsbahn directorate in Halle. By 1939, it had become one of Germany's busiest railway stations. The building was severely damaged by Allied bombing during World War II when during an air raid by the US Eighth Air Force on 7 July 1944 the roof over the concourse collapsed and the western entrance hall was destroyed. Numerous travellers and railway employees were killed. Rail traffic discontinued completely in April 1945.