MILITARY:
In weaponry, a Kill Box is a three-dimensional target area, defined to facilitate the integration of coordinated joint weapons fire.
Blue – permit air-to-surface fires in the Kill Box without further coordination or deconfliction with friendly forces.
Purple – reduces the coordination requirements for air-to-surface fires, while still allowing surface component commanders to employ surface-to-surface fire. It allows the maximum use of joint fires, creating a synergistic effect and maximum potential for neutralizing enemy forces.
https:// en.wikipedia.org/wiki/Kill_box
MOVIE: Kill Box
Home for good from a life in the service of the USA, John Simms, retired is set on a course of action unlike any other he has ever encountered in all his tours, when a long lost enemy returns to claim his payback. Inspired by real events.
http:// www.imdb.com/title/tt3444286/