How would the United States and South Korea deal with these underground facilities in wartime? First, it would have to locate the facilities. These facilities are hard to spot via satellite, and gleaning information from defectors is perhaps the best way to learn about them in peacetime. Once war commences, signal intelligence will pick up radio transmissions from previously unknown underground locations, enemy troops will from concealed positions or tunnel entrances, and artillery counter-battery radars will fix the positions of HARTS. It is likely that, despite advance preparations, many of these positions will be a surprise to Washington and Seoul
North Korea, one of the most secretive countries in the world, is no stranger to building underground military facilities. Whether a tunnel dug under the demilitarized zone designed to pass thousands of troops an hour, or bunkers to accommodate the regime’s leadership, North Korea has built extensive underground facilities designed to give it an edge in wartime.