Well, some of the systems that would be placed in Korea might have range to hit China or (conceivably) Russia, which may make them a bit nervous. I dunno.adam_grif wrote:Other than putting people's minds at ease, what tangible effect would this even have on the region? NK can't realistically expect to mount an invasion of the south without getting promptly curb-stomped by SK and her regional allies, and if they want to go nuclear then the US can obligingly retaliate in short order.
Have I missed something obvious here?
One point here is that nuclear-equipped US forces in South Korea would act as a tripwire: attack these troops and they will use nukes in self-defense, committing us to a nuclear war no matter what. That's massively reassuring to allies, who are likely to be a bit suspicious about our commitment to such a war normally.
As I mentioned before in the ABM thread, think about it like this. Suppose the North Koreans have some few long range ballistic missiles that can hit the west coast of the US, at least in principle. Suppose they invade South Korea, and use nuclear weapons to devastate the country. Will the US use its nuclear deterrent on North Korea in retaliation?
You might say "yes, of course." But what if the North Koreans threaten to fire their long range missiles at the US in retaliation for our use of nukes against them? Are we willing to risk losing, say, Honolulu, San Francisco, and Seattle to avenge South Korea? The South Koreans might reasonably wonder.
Placing tactical nukes in the area of operations thus acts to reassure them of our commitment- and also to discourage the North Koreans from trying the strategy I just described, since while that might conceivably the US from hitting them with ICBMs or nuclear bombers, it won't stop the Second Infantry Division from firing nuclear-tipped Tomahawk missiles on their troops to stop the North Koreans from overrunning them.