Chancellor of Germany was usually held by Archbishops of Mainz. The title was, at times, used in several states of German-speaking Europe. The modern office of chancellor was established with the North German Confederation, of which Otto von Bismarck became "Bundeskanzler" (meaning "Federal Chancellor") in 1867. With the enlargement of this federal state to the German Empire in 1871, the title was renamed to "Reichskanzler" (meaning "Chancellor of the Realm"). With Germany's constitution of 1949, the title of "Bundeskanzler" was revived. During the various eras, the role of the chancellor has varied. From 1867 to 1918, the chancellor was the only responsible minister
Iron Curtain defections in 1970 caused the Soviets to open very limited ethnic emigrations. The fall of the Iron Curtain was accompanied by a massive rise in European East-West migration. The Iron Curtain took physical shape in the form of border defenses between the countries of western and eastern Europe. There were some of the most heavily militarised areas in the world, particularly the so-called "inner German border" – commonly known as "die Grenze" in German – between East and West Germany. The inner German border was marked in rural areas by double fences made of steel mesh (expanded metal) with sharp