In the 1950s, six of us in the same family either enlisted or were drafted, four of us ended up in Korea, including this writer. There were many young men barely out of their teens, and included many U.S. reservists from WW2, and many other countries who also served, and fought. Many died there in a horrific war, which we were totally unprepared for, which begs many questions and views, this also happened in subsequent wars.
Why were we, and many others, there to begin with? The answer is quite simple, to protect Korea and its border with North Korea, a very belligerent, Communist power, from entering the border, and taking it over. We left over 38,000 young Americans dead there, plus over 7,500 missing in action, never to be heard from again, but the border was finally secured despite all these high costs.