So... you're too young to have watched Desert Storm on TV I take it? Because that's the same 'modern war' that would happen if there was a conventional fight on the Korean peninsula. Except there is no way it would stay non-nuclear/chemical. NK has the same antique hardware and doctrines that failed against their western counterparts then.
not to mention it wouldnt be a modern war. Given my understanding of NK's weapons and probably tactics, it would be more like iraq/afgan just with enough numbers on the low tech side to actually be a threat
The situation on the Korean Peninsula is not comparable to the Middle East. NK is armed with Cold War era devices, but has the benefits of Cold War-era Russian and Chinese military training and doctrine. They also have chemical/biological/nuclear weaponry and *might* actually be crazy enough to use them in a conflict, unlike Iraq in the 90s and Afghanistan/Iraq in 2001-2003.
In short, I was being quite serious when I said a conflict in the Koreas would be unlike anything we've seen in about four decades, and even then not all that comparable to Vietnam. It's historically uncharted, truly.