At that time, only a relatively small number of people in Germany knew how jazz music sounded in America - at that time, swing - and that it was Jazz. With the pressing wartime effort from 1941 to 1943, the Nazis accidentally fostered the jazz craze by forcing bands from Nazi-occupied nations in Western Europe to perform, bringing hot swing. Eventually, the Nazi party realized that jazz could not be removed entirely from Germany (WFMU Staff). The Nazis even re-developed and newly produced some pieces, giving them new lyrics, in special studios. One example is the song "Black Bottom", which was presented as "Schwarzer Boden". For some Germans, the banned foreign stations with jazz programs were very popular.
The communist German Democratic Republic was established in the historic "Mitteldeutschland" ( Middle Germany ). Former German territories east of the Oder and Neisse rivers, mainly the Prussian provinces of Pomerania , East Prussia , West Prussia , Upper Silesia , Lower Silesia , the eastern Neumark of Brandenburg , and a small piece of Saxony were thus detached from Germany. To compensate Poland for the USSR's annexation of its eastern provinces, the Allies provisionally established Poland's post-war western border at the Oder–Neisse line at the Yalta Conference (1945). As a result, most of Germany's central territories became the Sowjetische Besatzungszone (SBZ, Soviet Occupation Zone). All other lands east of the Oder–Neisse line were put under Polish administration, with the exception of historic northern East Prussia , which went to the USSR.