As American and coalition troops fight the first battles of this new century -- from Afghanistan to Yemen to the Philippines to Iraq -- they do so in ways never before seen. Until recently, information war was but one piece of a puzzle, more than a sideshow in war but far less than the sum total of the game. Today, however, we find information war revolutionizing combat, from top to bottom. Gone are the advantages of fortified positions -- nothing is impregnable any longer. Gone is the reason to create an overwhelming mass of troops -- now, troop concentrations merely present easier targets....