With the Guns

As these sketches of the changing phases of modern war are largely concerned with the work of the artillery, as, indeed, they are written from the standpoint of that branch of the Service, this would seem to be a favourable place to explain shortly the significance of the arm. My excuse, if any be needed, may be sought in the mind of the average man who, terrified as ever of the contemplation of anything technical, puzzled by the grandiloquence of the self-appointed "expert," regards the art of the artilleryman as written in a book sealed to him for ever by its own abstruseness.

Yet the general principles that guide the employment of the man with the gun, as distinguished from the man with the rifle, are very simple. In the first place, whereas the latter is only concerned with the incapacitating of personnel, the former has in addition the task of the destruction of matériel. The old and still popular idea of a battle, wherein each arm engages exclusively the similar arm of the enemy, has, since the middle of the last century, entirely disappeared. In a few words it may be said that the function of the artillery of the attack is to prepare the way for the infantry assault by the demolition of the enemy's defences, so far as that may be possible, and during this actual assault to prevent the enemy's troops from leaving their shelter and offering resistance. The artillery of the defence, on the other hand, must endeavour to check the fire of the hostile guns, either by overwhelming the batteries themselves by a fire so intense that the detachments cannot work the guns, or by the destruction of their observation posts. During the assault, their object must be to cover the space over which the hostile infantry must advance with so continuous a rain of shell that they are unable to reach their objective.

In order to perform these various duties with the greatest attainable efficiency artillery must possess two essentials. In the first place, it must be able to project the greatest possible weight of shell in a given time, and in the second it must be capable of rapid movement from one point to another so that it may be rapidly brought into use whenever the need for it is greatest. Now, obviously, the heavier the shell to be thrown, the greater must be the energy of the cartridge, and the greater the energy of the cartridge, the greater the strength (and consequently size and weight) of the gun necessary to withstand the pressures produced upon its discharge. On the other hand, if a gun is to be mobile, it must be as light as possible, both so that it can be moved at the required speed, and also that it can be taken over soft or difficult ground. Mobility and shell-power are therefore naturally antagonistic, the two cannot be combined in the same gun. The modern army, therefore, carries a range of guns, wherein maximum mobility controls one end of the scale and maximum shell-power the other. The former is represented by the mountain gun, firing a shell weighing some ten pounds and capable of being moved with great rapidity over practically any ground that a man can traverse laden, the latter by pieces of ordnance throwing a shell whose weight approximates to a ton, capable of very slow movement over good roads and requiring elaborately prepared positions from which to fire.