This work presents a historical constitution of the refugee protection regimes, in their three spheres - global, regional, and national – assuming its complementarity in consolidating the protection to the forced displacement. Starting from a constructivist presupposition, this approach will present the refuge protection framework as historical constructs fostered within social interactions, and which are in a continuous flow of specification over the new human needs. From this constructivist perspective that integrates interdisciplinary approaches to the international studies, the word regime will be used, in relation to the constructions of protection, with norms, principles and procedural pathways, around the theme of refuge. Thus, framed by a chronological structure, this research will start from the broader sphere of the 1951 Convention, passing through the sphere Regional, to culminate in the framework of national refugee protection. Special focus will be given to the regional sphere in expanding the definition of refugee, which takes place in Latin America, through the 1984 Cartagena Declaration, to overcome the Eurocentric limits of the classic definition. This approach of the region is connected to Brazil, which incorporates in law 9.474/97 the international classical definition and the expanded definition of serious and widespread human rights violations in Cartagena. Tracing this path, this dissertation presents, within the framework of the national refugee regime, the Brazilian response to the flow of Venezuelans, through the Operation Welcome. Therefore, we will analyze the axes of this Brazilian militarized migratory management, which occurs with strong prominence of the Armed Forces. Thus, this work highlights the simultaneity of the humanitarian and security logic of this national response, which demonstrates ambivalence between protecting the Venezuelans and protecting ourselves from them.