The ethics of war require a dynamism and creativity, not limited to the deductive constraints of generalization and idealistic theory. While dealing with ideals, ethical considerations need to make allowance for chaos and unpredictability, much like the scientific margins-of-error attributed to all calculations. Risk as an ever-existing phenomenon needs to be appropriated and used to remold theories of Just War and international law. It is the manifestation of risk that has taken the terminology of ‘irregular wars’ and the world that once considered it to have fallen, now witness its rise. The new age of warfare is one increasingly fought with irregular forces, thus necessitating the modification of army doctrine, political analysis, and the conception and application of ethics. These wars are not out-of-reach portrayals by historians of histories past, but televised and lived experiences of people in the present day. Thus, a consideration of the ethics of war requires the analysis of irregular warfare in the current context, not leaving out the cultural, religious, and psychological elements while considering the political and diplomatic spheres. In this paper I use the existing literature on irregular warfare and the ethics of war to outline the chief arguments made with respect to definition and application of ethics and doctrine for irregular wars. The ambiguity of the definition of the term is first seen, followed by the definition that seems The principles of jus ad bellum and jus in bello and the challenges these principles face when dealing with irregular warfare are listed. I then speak of the evolution of the Just War Theory from dealing merely with regular warfare to dealing with irregular warfare.