I’ve served as a Royal Marine (42 CDO) and in the French Foreign Legion (2 REP), and I’ve also worked in the oil, gas and mining industries in and around Africa and the Middle East.
Benjamin Franklin nailed it when he said, "Fatigue is the best pillow." True story, Benny. There's nothing like pushing your body so far past exhaustion that you'd willingly, even longingly, take a nap on a concrete slab.
And no one knows that better than military service members and we have the pictures to prove it.