At first glance, it is difficult to see the link between war and religion, but history teaches us that war was often an integral part of many religions. Some authors believe that there are truly religious wars, while the other power, more convincingly, is made by those who believe that there are no wars that are confused by religion, but that the political leaders, in order to achieve their goals, wished war show up just religious. The relationship between religion and war is often attempted to explain to religious functions. Sometimes the religious function of the war does not have to spontaneously occur by the endangered group, but it can be imposed on its people by the political actors themselves to substantiate the correctness of their goals, because they know the ability of faith to unite people but also to act upon it For the achievement of political goals and, ultimately, to encourage a particular group to attain these goals, religion was an appropriate solution as it is an excellent means of consolidating collective identity. The main task of memory politics or religious memory in bad historical moments is to convince certain people that the survival of their identity is challenged to encourage them to act collectively. Collective action in this sense refers to the war against the other people. In this case, it is more important to have another attribute of religion than to strengthen the conviction of belonging to a nation, and it is also a successful means of differentiation from another society. The link between religion and war is being sought on the example of three conflicts: global religious, Israeli-Palestinian and Yugoslav conflict.