My cousin was in Chu Lai and the GIs and Marines shared a bar with the ROKs. He saw a ROK from the Tiger get into it with a Marine over a Bgirl. The guy hit the Marine 3 times and the Marine stopped breathing. The ROK’s CO came storming in. They took the ROK out and the MPs told my cousin that the ROK officer put one round in the back of the guy’s head.Very tough hombres.
I had a battalion commander in Korea who had served as an enlisted soldier in Viet Nam. He had some similar stories about ROK discipline. While I never saw anything that dramatic, I did watch a ROK Army rail operation one time (i.e. downloading their artillery pieces off a rail head). The officers walked around with stopwatches and metal rods and they had no problem administering a healthy swat to soldiers who were falling out of synch with the exercise.