Mercy killing in battle is an illegal activity, yet, the evidence suggests, it happens on battlefields the world over and it has probably done so throughout human history. This may be a ?silent? part of the battlefield that few survivors wish to remember or to report subsequently. The practice is illegal, yet it raises difficult, perhaps sometimes impossible, ethical problems. A framework derived from the ethos of the just war tradition is developed here to analyse and to evaluate such battlefield (...) killings. (shrink)