Kim Jong-un directed the armed forces to intensify their efforts against U.S. carrier strike groups, because if the military “steadily studies and rounds off the war methods of mercilessly striking the enemy's backbone by the guerrillas-style combat method… it is quite possible to send even a carrier to the bottom of the sea.”
North Korea’s Navy and Air Force back in 2015 conducted a drill simulating “mercilessly striking” U.S. Aircraft Carriers using “guerrillas-style combat,” according to official media outlets.