Forms and methods of waging wars have been undergoing changes throughout the history. Hence the theory of war and the rules concerning it had changed. The XX century is the time when the international humanitarian law of military conflicts developed. However, contemporary military conflicts differ considerably from wars known from the past. Formerly, these were states that were conducting wars against each other. Nowadays, the situation is rather uncommon as the direct confrontation of two sovereign states rarely occurs. At present the theory of asymmetrical war is being formulated. The idea is to distinguish two sides of the conflict: classically understood states and radical representatives of certain ideology, religion, which is very often practices by a numerous social group. The paradigm of sides-participants of the military conflict, which were states in the past, is now breaking down for the benefit of a new power arrangement, which is revealed on a beyond-state scale. The principal consequence of the aforementioned facts is that countries participating in the military conflict are obligated to obey the rules of international humanitarian law of military conflicts. Whereas the other side of the conflict neither complies with nor pays attention to any of the restrictions. Therefore for some a war becomes a game with increasingly complex rules and for others a game with only one goal to achieve and without any rules to observe.