International law of war respresents a set of legal rules in armed conflict. It consist of the Geneva and Hague Conventions, additional contracts, case law and customary international law. The law of war has been applied exclusively since the beginning of conflict, and it protects people who are no longer involved in conflict (civilians, prisoners, wounded, etc.). The main goal of international law of war is to humanize war as much as possible. It is binding for all the states that have singed certain treaties, however, there are also other unwritten customary rights of war, which are also binding on states that are not signatories of certain international treaties. In a broader sense, the law of war also includes norms that are not directly related to conflicts, but relate to the consequences of war and the fate of war victims. The first codifications of the law of war took place in the 19th century, mostly thanks to Henry Dunant and the Red Cross. This was followed by the Hague Conferences of 1899 and 1907. They contained conventions and declarations on the peaceful settlement of disputes, the prohibition of the use of force, the prohibition of hostilities, the customs of war, the rights and duties of neutral forces, etc. After the Second World War, the Geneva convention was composed, which goal was to further humanize the war and supplement the law of war. In the 1960s, nuclear and biological weapons were restricted due to a major threat to humanity. In recent times, the law of war is increasingly called humanitarian law, primarily because the purpose is to protect the people in war, as well as the additional humanization of war.