They have the largest military organization on the planet at 9.5 million active, reserve and paramilitary personal. Their standing army is over a million strong. Over 4,000 tanks, 3,000 APCs, 18,000 artillery pieces, nuclear, chemical, and biological weapons. 18,000 aircraft in their air force. Heck they even use laser blinding weapons that are outlawed. etc, etc...
South Korea might have better equipment but in almost every regard they are outnumbered greatly. Seoul will fall quickly. Do you really think this commander and chief has the balls to fight back?
I don’t think anybody will let Seoul fall.
I’ll believe N. Korea has 18,000 functional aircraft in their air force when pigs fly...