I was one of the lucky ones who was never ordered to Southeast Asia so I have no first hand experience of combat.But having been assigned to Army hospitals I surely heard some stories....and saw some wounds.If forced to choose I'm not sure if I'd pick heat and humidity or snow,ice and frostbite.
IMO Truman made a huge mistake not threatening to use nukes in Korea.Yes,the Ruskies had just developed them too but Truman could have said to them "you stay on the sidelines and you'll have nothing to fear...but if you wanna mix it up with us,be our guests".But then I never rose above SP5 so maybe my opinion doesn't mean much.
Not for nuthin, but the guy making the decisons today has even less experience than you.
So...dont sell yourself short.