
North Korean Sang-O submarine captured by South Korea in 1996.
Something very strange has happened on the Korean peninsula. More than 50 North Korean submarines — about 70% of the country’s known fleet — have reportedly left their bases and disappeared from South Korea’s military radar. They also represent most of the North Korean Navy, which in addition to submarines, has relatively few surface combatants, roughly a half dozen frigates and an equal number of corvettes. What makes the deployment of the submarines even odder is that it coincides with a de-escalation of tensions between the two Koreas. On Monday, the two countries announced a plan to lift the “semi-state of war” prompted by a land-mine explosion that injured two South Korean soldiers on August 4. The two countries are technically at war, living under a cease-fire agreement since 1953.