During the Vietnam War, it was hoped that South Korean troops would sway the Vietnamese by showing off the products they had that had been made in their country. Unfortunately, the lesson didn’t take (probably because the Korean troops were brutal - they thought they were there to win a war against communism).
Those ROK troops were tough.
There were dire consequences to be caught
sleeping on guard duty if you were ROK.
That was my only experience with them...Bang.