John Hollyday served in the War of 1812, where the British invaded the fledgling United States and almost reconquered the territory they had lost only three decades before.
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.