In this article, we argue in favour of a conceptual expansion of the Just War idea of ‘due care’, to include the foreseeable, but indirect harm generated by Western force protection. This harm includes the phenomenon of ‘casualty displacement warfare’ – circumstances in which the prioritisation and relative success of Western force protection incentivises some Western adversaries to redirect more of their own violence away from Western soldiers and onto civilians. Primary moral responsibility for such violence should be allocated to those who violate the principle of non-combatant immunity, whatever their motivations. Critically though, we argue that Western militaries do bear some indirect culpability for the conflict conditions that structure such violence. These same militaries, we argue, are morally duty bound to do what they feasibly can to reduce the risks of casualty displacement, even if this necessitates a relaxation of their own commitment to force protection.