Bizone
（重定向自Trizone）
![Occupation zones of Germany, with the beige areas out of joint allied control (the former eastern territories of Germany acc. to the joint British, Soviet and US Potsdam Agreement of 1945 and the formerly western German Saar, following a French and US decision of 1946) and the state Free Hanseatic City of Bremen (est. as a US enclave within the British zone (as of early 1947).](/Images/godic/202502/17/Map-Germany-1945.svg1906.png")
The Bizone or Bizonia was the combination of the American and the British occupation zones in 1947 during the occupation of Germany after World War II. With the addition of the French occupation zone on the first of June 1948 the entity became the Trizone (sometimes jokingly called Trizonesia, as, for example, in a well-known Karneval song from that time, the Trizonesien-Song). Later, on 23 May 1949, the Trizone became the Federal Republic of Germany, commonly known as West Germany.