Korean Demilitarized Zone The Korean Demilitarized Zone (DMZ) is an area of land 4 kilometers-wide strip of land straddling the 151 mile long Military Demarcation Line The opposing sides agreed under the Armistice Agreement from entering the territory, air space or contiguous waters under control of the other. Even though North Korea has committed violations at sea and in the air, and has infiltrated armed agents along South Korea’s extensive coastline and outlying islands, it is in and along the DMZ that most Armistice violations have occurred.Home to some 2 million soldiers, the DMZ is the world's most heavily fortified border.These pictures by Mike Stone are from the Korean DMZ,2005.