Military security in cooperation with the capacity of self defense of a country is, first of all, the most important thing in security manifestation. A state which military security is threatened can not be able to provide any social and economic security to its own citizens. That's why it's very important to talk about the military security, especially because we are in a period when social, political and geopolitical events hovers a real threat to the national security system of the Republic of Moldova. The security system of the Republic of Moldova, besides the economic, social, political, and corruption menaces, is threatened by the mercenary phenomenon, especially in the situation of intensifying the conflict in Ukraine and the pre-existence of the separatist region on the left of the Dniester.