In weaponry, a kill box is a three-dimensional target area, defined to facilitate the integration of coordinated joint weapons fire.
[1][2][3] The space is defined by an area reference system, but could follow terrain features, be located by grid coordinates or a radius from a center point.
A type of fire support coordinating measure (FSCM), a kill box is often defined by a grid reference system based on lines of latitude and longitude, superimposed upon a map of an area of operation.
The U.S. Air Force further refined tactics, techniques, and procedures of kill box employment throughout the 1990s, leading to more efficient prosecution of targets.
While engagement authority is automatically granted by the establishment of a kill box, it does not relieve weapons system operators of the responsibility for complying with requirements such as commander's designated target priority, positive identification (PID), collateral damage assessments, rules of engagement (ROE), and special instructions (SPINS).