Changes

==Origin==

==Origin==

*[http://en.wikipedia.org/wiki/19th_century 1864]

*[https://en.wikipedia.org/wiki/19th_century 1864]

The term ''deadline'' originated from [[prison]] camps during [[war]], and referred to a physical line or [[boundary]]. Guards would shoot any prisoner who crossed the deadline. The "deadline" in such prison camps as [https://en.wikipedia.org/wiki/Andersonville_National_Historic_Site Confederate Prison Camp Andersonville] or [https://en.wikipedia.org/wiki/Camp_Douglas_(Chicago) Union Prison Camp Douglas Chicago] during the Civil War was "Inside (the wall), about 19 feet from the wall,” which prisoners were forbidden to cross. The "deadline" was intended to prevent prisoners from climbing over the stockade or from tunneling under it. The term was later [[adapted]] in its use to [[time]] lines, perhaps to show the seriousness of an end date in a timeline by referring to it as a "deadline."

The term ''deadline'' originated from [[prison]] camps during [[war]], and referred to a physical line or [[boundary]]. Guards would shoot any prisoner who crossed the deadline. The "deadline" in such prison camps as [https://en.wikipedia.org/wiki/Andersonville_National_Historic_Site Confederate Prison Camp Andersonville] or [https://en.wikipedia.org/wiki/Camp_Douglas_(Chicago) Union Prison Camp Douglas Chicago] during the Civil War was "Inside (the wall), about 19 feet from the wall,” which prisoners were forbidden to cross. The "deadline" was intended to prevent prisoners from climbing over the stockade or from tunneling under it. The term was later [[adapted]] in its use to [[time]] lines, perhaps to show the seriousness of an end date in a timeline by referring to it as a "deadline."

==Definition==

==Definition==