I agree about the nodding off. My son graduated from the Air Force Academy. Sometimes he would go 48 hours or more without anything but a few minutes of catnaps and it wasn’t because of parties, it was the work load they put on the cadets. I remember at the annual parents day parades there would always be cadets that would literally faint on the parade grounds. My son would say “you are to busy to find time to eat and that is what happens”; some faint. One year we counted 24 out of the 4,000 or so on the grounds that fainted during the course of the marching and field drills.
We had a plebe at Annapolis get openned up by a bayonet on the parade ground when he fainted. Wasn’t just lack of sleep. The heat & humidity in August was absolutely tropical. If you locked your knees you were a goner.