About Thinking PipeQuestions on anything from the world of business to sports, from science and technology to current affairs. You'll find it all. Updates (almost) daily!
Search this site
Subscribe to Thinking Pipe
In the Civil war era, Prisoner of Wars were kept at bay by a 17 foot high fence surrounding the prisons. In case one of them escaped, a further perimeter like the one shown in the picture was established, beyond which any person if seen was shot dead.
What term did it lead to in the modern lingo?