WARFARE EVOLUTION BLOG: When I first started researching this topic, I thought writing this article would be straight-forward and easy. As with many other subjects in this series, that was not the case. Targeting models are integrated into kill chains, or vice-versa, and that creates some confusion. The available stream of information about this subject is both narrow and shallow. However, we are seeing a sequence of evolving kill chain models, at the strategic and tactical levels.