While Kim Jong Un has already long had the tools to destroy South Korea effectively, he also believes it is necessary to drive American forces out of the peninsula. And this can be done, he believes, by being able to credibly threaten the continental United States with nuclear weapons. On top of the thousands of artillery pieces and short-range missile capabilities long held on the North Korean side, the potential deployment of battle-ready nuclear ICBMs means the threat is not only towards South Korea, but also towards America.