This article investigates the military approach as a means of solving protracted civil conflicts, in particular focusing on the cases of Sri Lanka and Colombia in comparison. The approach adopted is to study the emergence of these military options within the context of each country's history and to assess whether the call for war was merely a consequence of the international ‘war on terror’, or driven by internal elements. The article explores the epistemological groundings and pitfalls of the all-out war theory informing this approach, before reassessing the significance and validity of the theory in relation to Sri Lanka and Colombia.