French, British, American and Soviet troops divided Vienna into four zones, and a small international zone of the historical centre of Vienna was governed in rotation by troops of those countries. During the Cold War and division of Berlin, the Friedrichstraße station, despite being located entirely in East Berlin, S-Bahn and U-Bahn trains from West Berlin continued to serve the station. West Berliners were able to transfer between the S-Bahn and U-Bahn, or to long distance trains to the West without passing through East German border controls.