Inner German border
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The inner German border was the frontier between the German Democratic Republic and the Federal Republic of Germany from 1949 to 1990. De jure not including the similar but physically separate Berlin Wall, the border was 1,381 kilometres long and... Wikipedia
Battles/wars: Cold War
Built: 1945
Condition: Mostly demolished
Height: Up to 4 metres (13 ft)
In use: 1945–90