That was Rumsfield biggest failure.
His cheap and easy war theory simply does not work. Technology is no substitute for ground pounders to secure a country.
Not only did it work. It worked magnificently. The military victory our forces achieved in Iraq is unprecedented in the history of warfare with regard to invading a hostile nation guarded by an entrenched defense with numerically superior forces. The insurgency we are now fighting is an entirely different battle. And if history proves anything, it proves you cannot defeat an insurgency by trying to overwhelm it with superior numbers of conventional forces.
Yeah, but "ground pounders" are useless if they've been reduced to little more than a well-armed Peace Corps.