I gave my reasons on south and north korea.
And your reason was juvenile. It revealed an immature understanding of people and international affairs in general.
A fight between the two Koreas would result in a route for the northern half. That does not mean the south will not suffer damages. Yes, the South Koreans would take losses, but you and the Chinese group here overestimate the North Koreans and underestimate the South Koreans, not because you have any real understanding of military affairs but that you just want to cast a US ally in as negative a light as possible. Simple as that.
In one generation, the North Koreans, as an isolated group, became inferior to the South Koreans in every
MEASURABLE ways, from physical being to intellect. There are
DIRECT evidences for that -- defectors. The male defectors lamented that they cannot find mates in South Korea because ordinary South Korean women are taller than they are, and that their competitors, the South Korean men, are generally healthier and more physically attractive. Physical status just one of several reasons why many North Koreans who defected to the south but then want to return to the north.
In a war between the two Koreas, both sides have equal reason/motivation to fight to the utmost. Either side would lose its existence. Either no more North Korea or no more South Korea. The idea of a single Korea matters less than the idea of no more North/South Korea. Why ? Because what most Koreans, North and South, know is: North Korea and South Korea. The idea of a single Korea is mostly intellectual and philosophical while the existences of North and South Koreas are real. A single Korea belongs to their ancestors and most of them are dead. North and South are what the current generation know and defends.
So if -- in a war between the two Koreas -- the reason/motivator is the same, what then
WOULD -- not could -- be the deciding factor for victory and the real probability of the erasure of one Korea ? The disparity of technology between the two. The North Korean military would be defeated. Whether Seoul want to push northward and unify the country or not is independent of the fact that technically speaking, the south is superior and will militarily defeat the north.
Speaking from an air force perspective, the ROKAF will have control of North Korean airspace.
Air Dominance - The ability of an air force to compel other air forces to rearray themselves into subordinate postures.
Air Superiority - The ability of an air force to take control of contested airspace and if there are losses, those losses would not pose a statistical deterrence to that ability.
Air Supremacy - He flies, he dies.
To date, only US airpower have the ability to compel other air forces to rearray themselves just from presence alone. In Desert Storm, the US and allies went from dominance to supremacy of Iraqi airspace in hours, not days.
The ROKAF is not as powerful as US airpower, but it will be able to achieve air superiority of large areas of North Korean airspace. That control may not be persistent, but even repeated duration of control of key air corridors and areas would be enough to give the South Korean army relief from the threat of air assaults so it can better focus on ground combat. And today, without air power, a loss is quite assured.
