Study of the effect of columns brings us to the consideration of mass operations in general. Read this singular argument in favor of attacks by battalions in close columns: "A column cannot stop instantly without a command. Suppose your first rank stops at the instant of shock: the twelve ranks of the battalion, coming up successively, would come in contact with it, pushing it forward.... Experiments made have shown that beyond the sixteenth the impulsion of the ranks in rear has no effect on the front, it is completely taken up by the fifteen ranks already massed behind the first.... To make the experiment, march at charging pace and command halt to the front rank without warning the rest. The ranks will precipitate themselves upon each other unless they be very attentive, or unless, anticipating the command, they check themselves unconsciously while marching." But in a real charge, all your ranks are attentive, restless, anxious about what is taking place at the front and, if the latter halts, if the first line stops, there will be a movement to the rear and not to the front. Take a good battalion, possessed of extraordinary calmness and coolness, thrown full speed on the enemy, at one hundred and twenty steps to the minute. To-day it would have to advance under a fire of five shots a minute! At this last desperate moment if the front rank stops, it will not be pushed, according to the theory of successive impulses, it will be upset. The second line will arrive only to fall over the first and so on. There should be a drill ground test to see up to what rank this falling of the pasteboard figures would extend. Physical impulse is merely a word. If the front rank stops it will let itself fall and be trampled under foot rather than cede to the pressure that pushes it forward. Any one experienced in infantry engagements of to-day knows that is just what happens. This shows the error of the theory of physical impulse--a theory that continues to dictate as under the Empire (so strong is routine and prejudice) attacks in close column. Such attacks are marked by absolute disorder and lack of leadership. Take a battalion fresh from barracks, in light marching order; intent only on the maneuver to be executed. It marches in close column in good order; its subdivisions are full four paces apart. The non-commissioned officers control the men. But it is true that if the terrain is slightly accidented, if the guide does not march with mathematical precision, the battalion in close column becomes in the twinkling of an eye a flock of sheep. What would happen to a battalion in such a formation, at one hundred paces from the enemy? Nobody will ever see such an instance in these days of the rifle.