A Treatise on the Tactical Use of the Three Arms: Infantry, Artillery, and Cavalry
14. Our present Infantry Tactics have adopted two new expedients to accelerate the advance of battalions, and diminish the loss to which columns of attack are liable--Division Columns and Advancing by the Flank of Subdivisions.
As Division Columns break the battalion line into several columns, each of two or three subdivisions deep, as a substitute for a single column four or five subdivisions deep, they undoubtedly diminish the loss from the enemy's artillery fire in corresponding proportion. But in compensation for this partial advantage, they have th