The act of controlling criminal activities at the border for national security is known as national security. Nepal is a small country which lies between two big countries i.e. China and Nepal. There is high risk of broader encroachment in southern border than in northern border as the plain land in the southern border is easy to displace. But the northern border is full of steep rocks and mountains. So, the possibility of broader encroachment in northern border is less. Nepalese are still fighting for border security. As a result, a hidden cold war is taking place between patriotic Nepalese and the Indian government to solve the problems of border encroachment.