First of all NK never technically stopped being at war with SK, and this isn't the first time they declared the armistice invalid. The only reason this is occurring is because the UN placed higher sanctions on NK after they threatened to proceed with nuclear testing. Which honestly isn't much of a surprise since we knew they had nuclear weapons already. You have to remember that since China actually backed the last round of sanctions against NK they arent in a position to do much other than spout their mouths off. The have literally one card they can play to try and force the UN to lower sanctions and that is threatening all out nuclear war. Which is what they've been doing. However that does not mean for a moment that they would actually do it. Particularly now that its much less likely that China would waste any more time over them. North Korea's higher ups actually live pretty comfortably and are pretty aware of their situation. The absolute last thing they would do would be to throw away their status by becoming needlessly involved in what would be a devastating war on both sides. Not to mention their population is in no condition to start a war. As I stated earlier, this is only posturing to try and force the UN into backing down on their sanctions. Also, don't get your news from RT, they sensationalize literally everything they get their hands on and those big ass banners saying "breaking" and images of North Korean troops marching only serve to make you look like you're pushing an agenda.
That said, i've always been one to love me some wargames so lets look at what would actually go down if Best Korea actually invaded the south. I found this post from reddit answering how we would counter the north's blitz into south korea to be pretty interesting:
This is from my Social Studies teacher, who was a Marine Colonel stationed in SK during the 80's. He assumed not much has changed.
We plan to lose most of South Korea. If NK attacks, the US forces are to immediately fall back and form a defensive perimeter around Pusan, just like in the first war. NK has too many artillery pieces near the border to put up an effective defense there, plus the hope was that by not putting up a fight near Seoul, they could minimize the shelling and civilian casualties. From there US planes based in Japan, Pusan and the nearby carrier group can begin picking off NK artillery, destroying enemy armor and hitting infantry columns. Within a few hours additional marines can be onsite from the carrier group, within 12 they can be there from Japan, and within 48 they can be there from Hawaii.
As long as Pusan holds, the marines should be able to launch their counter offensive by day 3. The Army should arrive by day 5 including an amphibious landing at Inchon if necessary. By day 10 its planned that US troops would be in Pyongyang.
tl;dr Our defense against the blitz is too not be anywhere near the blitz, then force them to concentrate into a small area, limiting the speed and amount of forces they can use before reinforcing and striking back.
Granted this is a plan from the 80's but the only thing that would really change is that our airforce is like a million times more effective now so it would really just take less time to actually neutralize any threat. And before anyone says it, no NK will not nuke SK. If there is a single principle that both the north and south believe in it is the desire to one day reunite korea. Its not typically a good play to nuke the territories you are trying to conquer. If they did nuke anybody it would be the United States but the fact is that they don't have anything even remotely reliable enough to pull that off. Nor do they have the range capabilities to even hit hawaii, nevermind the mainland.
Also, I would recommend you read the declaration yourself. You can find a copy of it here:
http://live.reuters.com/Event/North_Korea/70001409 TL;DR
Spoiler
Yeah this thread is bullshit.
No it's not.
Yes it is.
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