——How do you prevent South Korea from being flattened——
The tactic is simple. The first actions are to destroy completely command and control. Like Germany in 1944, North Korean officers do not have initiative. They will not act without orders from above.
If the chain of command is severed, there will be no orders from above.
The problem becomes, how good is the intelligence locating the command and control nodes.
“——How do you prevent South Korea from being flattened——”
I still think that there would, of necessity, be the need for a massive attack on NK’s border installations, because you could not completely rely on the rank and file not commencing firing on Seoul. Seoul’s proximity to the border is a big problem, but with current weapons technology today, it probably doesn’t make as big a difference as it once did.