Pyongyang’s Last Gamble?

At the National Interest, I ruminate a bit about how a conflict might start on the Korean Peninsula, and how it might play out:

The general peace on the peninsula has more or less held since the 1950s. Still, while North Korea’s power has declined substantially relative to that of South Korea, the idea that Pyongyang might come to the conclusion that war could solve its problems still worries U.S. and South Korean planners.

If North Korea faced a situation in which it determined that war was the only solution, how might it seek to crush the ROK, and deter the United States and Japan?