There is that, but I did read that stimulants were distributed by the Army. My high school history teacher was an infantry officer Vietnam vet. When he learned I was interested (my father was a Navy officer vet), he gave me books about Vietnam all year and had me give reports on them.
Once the bulb on the filmstrip project blew out, and he yelled, “Incoming!” and dived under a desk. I had a lot of nightmares that year.
Mr. Hazelett, may he Rest in Peace, was my 8th grade math teacher. He was a Korean war vet, and had some serious PTSD. He spoke with a stammer. The kids knew he had “shell shock” and at least once a month when he was writing a problem on the chalkboard with his back to the class, some kid would drop a textbook on the floor just to watch him jump or dive.
Even though I had my cruel phase, I never dreamed of doing that to Mr. Hazelett and was disgusted when the other kids did. That he had to endure that just to earn a living still makes me very sad to this day.