International Humanitarian Law is still subject to continuous evolution. It is the law both of the international and the internal armed conflicts or civil wars, as well as of armed conflicts which have been internationalized. This work raises the question whether non-international armed conflicts become international or can be internationalized and specifies the requirements for this processes. This work aims to identify ways to improve the conditions during the armed confrontations, the protection of the parties and of the victims of the armed conflict, while the prosecution of the persons responsible for serious violations of IHL is not part of the study. Improving the protection standards in times when the number of international armed conflicts has decreased while the internal armed conflicts has increased in number and in intensity is the key function of the internationalization of internal armed conflicts.