In military tactics, the kill zone, also known as killing zone, is an area entirely exposed to effective direct fire or accurately zeroed indirect fire, typically as an element of ambush within which an approaching enemy force is encircled/flanked, engaged and destroyed. The objective of the ambushing force is to seize the element of surprise to quickly kill or capture all hostile combatants inside the kill zone, and the ambushed soldiers (who may or may not be trapped) may respond by counterattacking and/or breaking out of the kill zone.
The term is also used in non-lethal sense in military exercises and simulations, as well as in recreational wargaming and MilSim shooting sports such as paintball, airsoft and laser tag, as a region within the training area, playing field or arena where intense shootouts and elimination of participants are most likely to happen.