I've read a bit about the weather there, and my recollection is that in addition to the actual cold, the winds were quite a problem. Like the NE US compared to where I am (WA, not all that far south of 49 degree), much colder due to the large cold land mass over which the air travels. It was, at least in the northern parts of Korea, also windy. Very windy.

A lot of men (and some women, like nurses) did some very hard tasks under horrible conditions. This is of course true in any war - the nature of the conditions vary, but the hardships are constant. For good measure, the learning curve about gear and functionality are often far behind.

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NHI, 10-8.