MDL meaning in Military and Defence ?

The Military Demarcation Line (MDL), sometimes referred to as the Armistice Line, is the land border or demarcation line between North Korea and South Korea. On either side of the line is the Korean Demilitarized Zone (DMZ). The MDL and DMZ were established by the Armistice.

In the Yellow Sea, the two Koreas are divided by a de facto maritime "military demarcation line" and maritime boundary called the Northern Limit Line (NLL) drawn by the United Nations Command in 1953. The NLL is not described by the Korean Armistice Agreement. Locals and foreigners will be allowed to cross the line at the Joint Security Area once this area is cleared.