Terrorism as a political and security phenomenon has always attracted, in various forms, the interest of the international community, and affected security establishments in different countries and regions all over the world. Although we can trace its historical roots 200 years back, the most significant impact on safety was in the 20^th and at the beginning of the 21^st century. From state-sponsored terrorism (which will be remembered in history as an attempt to satisfy the legitimacy of terror and protection of foreign interests), through internationalization of national liberation wars and ethnic conflicts, to the left and right-oriented terrorist groups in Europe, terrorism was always determined by two basic appearances: terror and violence. These appearances forced European countries, unsatisfied with global efforts to combat terrorism in the last century, to find common solutions in creating an institutionalized framework for cooperation.