On June, 20th 1945 the british major general Barber and the sowjet officer Lyaschenko concluded an agreement concerning the frontier revision. It was a matter of exchanging the former British region east of the Schaalsee as well as Groß and Klein Thurow and Dechow by a part of Mecklenburg (occupied by the Russians) reaching from Hohenleuchten to Ziethen.

England allowed the inhabitants living at the Schaalsee to move into the British zone and to take all mobile goods with them. Those who did not want to leave their home were granted a horse, a cow, a calf, a plough and a harrow plus food for a span of thirty days. The evacuation was finished by the end of November. Before the Sowjet troops arrived a special German commission had made sure that no objects of value remained.

To guarantee a clear view and also a clear field of fire nearly all buildings between the two border fences were torn down, not only ordinary residential buildings and stables but historical architectural monuments, too.

Even whole villages disappeared. Buildings and villages that had not been demolished within the restricted area were especially secured, entering or leaving of fenced villages was allowed only until curfew and only through special passages.

Initially evacuations concerned an area of 500 m width, but was soon widened up to 5 km. They were usually managed at night and within as little time as possible. The evacuation took place in several operations. The first one in 1951 for instance was called Operation Vernim and concerned unreliable persons, foreigners and stateless people. During the first operation 8369 persons were deported from the vicinity of today's Northwest Mecklenburg.