Incorporating lessons from Western special operations forces, the Russian military has established its own equivalent of the U.S. Army’s elite 1st Special Forces Operational Detachment-Delta—better known as Delta Force. This new force is called Special Operations Command, known by its Russian acronym as KSSO.
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.