I'm not so sure. The Korean war was an absolute disaster for all involved. Three years and a million dead people for nothing (or less than nothing if you consi

I'm not so sure. The Korean war was an absolute disaster for all involved. Three years and a million dead people for nothing (or less than nothing if you consider the amount of sheer destruction). I think that has been the main rationale for avoiding another war in Korea since then. The "perfect" time to do it would have been in the 90s when China was still poor enough to ignore and Russia was still self-combusting. Things are different now. Compare Russia's non-response to the destruction of Yugoslavia to their direct role in Syria, both diplomatically (red line etc) and militarily. I think killing Gaddafi was NATO's biggest disaster in a long time (if not the worst so far). It was a clear example to DPRK that they must have a capable ICBM. It was also the last straw for Putin which spurred him onto more aggressive actions like taking Crimea and using "fake news" farms.