In Bavaria and in Württemberg-Baden, Radio München (Munich) and Radio Stuttgart went on air in 1945. In the next years, Radio München was transformed to a Bavarian broadcaster, and in Germany's South West, two public broadcasting corporations started and produced radio and (subsequent) television programs up to their merger in 1998:Südwestfunk, SWF, in the former French zone, founded in 1946, and Süddeutscher Rundfunk, called "Südfunk", short SDR, founded in 1949.

The entirety of Germany was occupied and administered by the Allies of World War II from the Berlin Declaration on 5 June 1945 to the establishment of West Germany on 23 May 1949. Unlike occupied Japan, Germany was stripped of its sovereignty and former state: after Nazi Germany surrendered on 8 May 1945, four countries representing the Allies asserted joint authority and sovereignty through the Allied Control Council (ACC). At first, Allied-occupied Germany was defined as all territories of Germany before the 1938 Nazi annexation of Austria; the Potsdam Agreement on 2 August 1945 defined the new eastern German border by giving Poland and the Soviet Union all regions of Germany east of the Oder–Neisse line and divided the remaining "Germany as a whole" into four occupation zones, each administered by one of the Allies.