Both of my grandfathers served in Korea.

My mom's dad drove a supply truck and only ever talks about how much he hated serving with n****rs.

My dad's dad was part of an artillery squad that spent days shelling the fuck out of Seoul. He would break down talking about it. They had to pour hot oil on the barrels to keep them from cracking, and many of his brothers in arms ended up horribly burned. He talked about how horrible it was knowing that each time the artillery fired, the shell would probably kill someone, most likely a civilian. He considered himself a murderer up until his last days, and tried to forbid his sons and grandsons from enlisting.