Kill Chain

The kill chain is the sequence of steps a defensive system must complete to engage a target: find it, fix its position, track it, decide to engage, fire or otherwise defeat it, and assess the result — often abbreviated F2T2EA. The concept originated in offensive targeting but applies equally to counter-drone defense, where every link must close before the threat completes its mission. A radar that detects at five kilometers paired with a command system that needs ten minutes to approve a shot is a broken chain, regardless of how good the interceptor is.

Counter-UAS compresses every step. Small drones fly low and slow among clutter, which shortens detection ranges; one-way attack drones arrive in groups, which saturates tracking and engagement capacity; and the time from detection to impact can be under a minute. This is why modern systems automate detection, tracking, and cueing aggressively, keeping humans in supervisory roles for the engagement decision itself.

The chain is also the analytical frame for judging defenses. Breaking any single link — blinding the sensor, flooding the track picture, outrunning the engagement window — defeats the whole system, which is why attackers and defenders both study the chain rather than individual weapons.