There is an explicit link between the historical evolution of migratory movements, their social and economic significance, the various phases of the development of states and the stability of the relationships between individuals and states sharing common borders. The starting point of this study is motivated by the denaturalization of reality by political actors through inappropriate responses, based on mixed considerations of the migrations of Rwandans and of Hutu or Tutsi peoples living in the DRC compared to Ugandan nationals. On the one hand, most of them move between these three states and invade agro-pastoral and mining lands in fertile or mining areas, especially in the DRC. Our study aims to identify the causes of the persistence of the crises between the DRC, Uganda and Rwanda, which crises are linked to the multiple migratory movements of their respective nationals. In practical terms, we will determine the characteristics of the migratory movements between the three states and present the causes of this persistence of the crises. We have identified direct and indirect causes, among which uncontrolled migration by clandestine routes constitute a major cause of the security crises between these three states.