Migration between states in a globalized world is a daily occurrence, but also a great security challenge for all states. Illegal migration is a particular challenge for security. This form of migration poses a security challenge because of the difficult, and in some situations impossible, management of the situation and the great potential threats such as smuggling, human trafficking and the uncontrolled flow of weapons, drugs and other criminal activities across national borders. For these and many other reasons, states are increasingly resorting to border management policies that address traditional forms of border protection, such as the construction of barriers in the form of fences, walls and other obstacles. Although, on the one hand, globalization is removing the borders between states, continents, different parts of the world and people, we are increasingly witnessing that nation-states see the protection of their borders as one of the most important issues. This paper deals with three geographically different countries, but the border management policies under the influence of migrant movements in the analyzed cases are very similar, with almost the same result. The paper monitors Israel, Hungary and the United States and their border management policies during the onset of mass migrations toward national borders, and in some cases migrant crises, with a large number of illegal migrants. Through an analysis of the processes, political moves, documents and other sources, changes in these policies are tracked through the most current migrant challenges that the analyzed countries have faced in the 21st century.