摘要:The migration crisis was and, in some aspects, still is one of the biggest challenges that the European Union (EU) has faced recently. In the crisis peak in 2015/16, most of its member states were affected in different ways. This paper contributes to the ex-post dialog of this transboundary crisis and attempts to present the level of readiness to solve wicked problems and manage a transboundary crisis, looking at the perspective of two countries—Slovenia and Croatia. The paper focuses on the following areas of migration governance: (1) border management, (2) reception policies, (3) migrant protection regimes, and (4) national security, which represented the main issues for transit countries and are embedded in the capacity assessing tool Survey Tool used in the paper. With its set of questions and using a multiple case studies methodology and comparative analysis, the paper’s results show the rather immature level of mass migration capacities at both transit levels studied. In the absence of migration crisis studies, the proposed paper retains its originality and adds value, especially in multi-level systems, in assessing the complexity of the crisis from a national perspective and providing the numerical assessment of crisis management capacity.