From July 17 to August 2 , 1945 , the victorious Allies reached the Potsdam Agreement on the fate of postwar Europe , calling for the division of defeated Germany into four temporary occupation zones ( thus re-affirming principles laid out earlier by the Yalta Conference ) . These zones were located roughly around the then-current locations of the allied armies . Also divided into occupation zones , Berlin was located inside Soviet-controlled eastern Germany . The United States , United Kingdom , and France controlled western portions of the city , while Soviet troops controlled the eastern sector
Yalta Conference
Yalta Conference
Berlin Blockade