If this situation does escalate into anything other than words and posturing I'm afraid that KJU will be safe from harm in some bunker, whilst the civilians in NK will be very much on dangerous ground.
I personally would be surprised if the USA and her allies would want to commit yet more ground troops to another potentially protracted conflict. I think we would more likely see (relatively) short term bombing raids throwing down a lot of ordnance with the inherent risk to civilians despite best efforts.
Also, does anyone know why the NK news readers all sit there like shouty ventriloquist dummies? I would rather watch Fox "News" than sit watching that stuff!!