Note 35 — Chapter XVIII · THE HOSTAGE
Reading edition
These words “concentration” and “a wide front” may seem self-contradictory. I mean by concentration a massed invasion, if you are to succeed against a military people; and by “a wide front” the necessity for attacking such a people in several places at once, if you are to succeed. For a force marching by a single narrow gate (such as is the valley of the Meuse) is in peril of destruction if its opponents are used to war.