Abstract
At the end of the cold war ,the non- international armed conflicts have become a real threat to the international peace and security . As a result, the United Nations have its role to keep the international peace though there were no legal rules to regulate national conflicts in the United Nations charter as they are internal affairs which should be solved within the borders of the same state and its sovereignty .Yet, such conflicts could be changed to international conflicts as they have national and religious connections with the citizens of the states of these conflicts . Thus, the intervention has become a necessity according to nature of the phase and development on the international arena , where the collision between the capitalist and the communist camp has become too improbable , through the preventive diplomacy by sending United Nations special envoys who make their roles to keep international peace and security in such conflicts