In the last two hours of his life, Air Force Tech. Sgt. John A. Chapman saved the lives of a special operations teams by sacrificing himself to stop the enemy from shooting down a helicopter carrying reinforcements to the battle.
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.
In 2002, John Chapman survived alone on top of Roberts Ridge through a cold Afghan night, fending off assaults by the Taliban single-handedly. He sacrificed his life to provide cover for a Chinook full of Rangers who were about to set down inside of a Taliban killbox.