The paper builds on a current debate in the philosophy of war, which are rules that contribute to the containment of war and to a system of fair rules in warfare. Both are key issues in the “jus in bello” as a central part of war ethics. Recently, philosophers have questioned a general exculpation of soldiers in that context. Instead of restricting the debate on “justifiable killing” to the “jus ad bellum,”which explores moral restrictions in starting warfare, philosophers examine moral implications when soldiers kill in war. Even though epistemic limitations and duties of soldiers need to be taken into account, the paper argues for a more detailed exploration of acts of killing in war by soldiers.