
Many soldiers are led to faulty ideas of war by knowing too much about too little.
George S. Patton
The older approach to war was that of attrition. The warring factions showed up in their full strength and fought till the other party was utterly defeated.
The modern approach used is termed Maneuver Warfare. The MCDP outlines this approach. The deciding factor, however, still is human skill — not technology.