On March 11, 1968, on a remote mountain top in Laos called Lima Site 85, Air Force Chief Master Sgt. Richard Etchberger singlehandedly repelled a North Vietnamese assault and ultimately gave his life to save his teammates.
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.