The article addresses the question in the ethics of war as to who shall be given immunity in acts of defensive force. The author argues against the view that the mere fact that some people are not combatants is enough to justify granting them immunity. He suggests, instead, that although civilians are not combatants, and not a threat to the defending party, there might be relations between civilians and the soldiers making it permissible to kill the former to impede the aggression of the latter. However, when there are no such relations, civilians do enjoy immunity, and should not be victims of war, intended or otherwise.