Which 1985 agreement between many EC states led to the removal of border controls between those countries?
Germany–Poland border German reunification, the border became part of the eastern border of the European Community, then that of the European Union. For a period, it was "the most heavily policed border in Europe". After Poland joined the European Union in 2004, the border controls were relaxed in agreement with the Schengen Agreement to eliminate passport controls by 2007. The modern borderlands of Poland and Germany are inhabited by about one million of those countries' citizens within the counties on each side. Germany–Poland border The Germany–Poland border (, ), the state border between Poland and Germany, is currently the Oder–Neisse line. It
Schengen Agreement the European Economic Community, nationals of EEC member states could travel freely from one member state to another on production of their passports or national identity cards. However, systematic identity controls were still in place at the border between most member states. Disagreement between member states led to an impasse on the abolition of border controls within the Community, but in 1985 five of the then ten member states – Belgium, France, Luxembourg, the Netherlands, and West Germany – signed an agreement on the gradual abolition of common border controls. The agreement was signed on the "Princess Marie-Astrid" boat on