 The vast majority of "Grenztruppen" efforts were directed along the GDR's western borders with West Germany and West Berlin, with only about 600 members assigned to guard the GDR's borders with Poland and Czechoslovakia.This continued until the 1980s when the rise of the Solidarity trade union in Poland saw the GDR considerably toughen the "Grenztruppen"'s presence along their border.On 1 July 1990, the GDR's border control regime along the borders with West Germany and West Berlin was ended.