 Complete the following phrase:  The future division of Germany was implicit in the creation of the four military occupation zones in 1945: it was made explicit with the launch of the US sponsored and Soviet sponsored German Federal Republic and German Democratic Republic in, respectively, May and October 1949. There was no sudden erection of barriers in 1949, however, and through the first part of the 1950s it remained possible for people to pass between West and East Germany. After 1952 the 