2010年打沉韩国天安舰及炮击延坪岛等行为史无前例，朝韩之间的紧张局势也因此达到数十年来的顶峰。
Its sinking of the South Korean corvette Cheonan and the shelling of Yeonpyeong Island in 2010 were unprecedented, and raised inter-Korean tensions to their highest level in decades.