Whereas Germany was divided into East and West Germany in 1949, Austria remained under joint occupation of the Western Allies and of the Soviet Union until 1955; its status became a controversial subject in the Cold War until the warming of relations known as the Khrushchev Thaw. After Austrian promises of perpetual neutrality, Austria was accorded full independence on 15 May 1955 and the last occupation troops left on 25 October that year.