Book excerpt: Master's Thesis from the year 2018 in the subject Law - European and International Law, Intellectual Properties, grade: 1, University of Vienna, language: English, abstract: The development of modern world is impossible to imagine without processes of migration of the population. Migration crisis, which began in the EU states in April 2015 in connection with uncontrolled flow of refugees and migrants from zones of armed conflicts in middle East as well as in number of African and Asian states with unfavorable socio-economic conditions caused extremely negative effect on the internal political situation and the perspectives of the development of both individual Member States of the EU and European community as a whole. Being one of globalization process manifestation, migration in large causes positive influence on social, economic and political development of states, contributes to integration of integration of international community , cultural convergence of peoples, development of productive forces. However, if migration processes have uncontrolled character, the level of state security is significantly reducing. Especially it has to be considered in the present period when global community faces terrorist threats and violence. The relevance of my master thesis is stipulated by exacerbation of illegal immigration problem due to widening of the EU in recent times, which entailed improvement of national legislations and the European Law in this field. Thus, there is a necessity of the analysis of the EU law application experience in sphere of tackling the illegal migration.