To arrive at assaulting distance, advance by thin lines formed by halving the skirmish lines already deployed; these lines, at least 100 metres apart, advance successively by alternate rushes, then unite on the line designated as the starting point for the assault.
A natural parallel of departure may exist or may partially exist, or it may not exist at all. In the second case, the line of shelters must be adapted, and in the third case it must be created in order to be able to stay a few moments at a short distance from the enemy without being destroyed. To facilitate this extremely difficult and dangerous construction, it is a good thing to have each man fill a sand bag at the last shelter and put in some stones, which, while not bulky, stop the bullets. Each man makes his rushes with his sand bag, which protects him partially during the halts. Having reached the line fixed upon for the parallel, this sand bag serves him as a cover, which he has only to complete rapidly. Each man then enlarges his shelter so as to accommodate near comrades.
The first wave, reformed at the assaulting distance, makes the assault as before. At times, the losses and the confusion of units may lead to an assault by entire companies.
The second and third waves follow and imitate the movements of the first.
Machine Guns and Light Cannon.
The artillery can only give the second line a support which is often partial and not very effective; its action must be replaced at whatever cost by other means, such as machine guns for sweeping the hostile firing line and light cannon to instantly destroy the hostile machine guns.
Location of the Machine-Gun and Gun Crews during the Assault.—These detachments follow the last waves of the first line, and they therefore are not directly taken under fire and can profit by the indications of the fight of the first line and so be in a way to act effectively when the second line comes into action.
Machine Guns.—The machine gun is an element of attack and the most terrible arm of close fighting. However, it is employed in the attack only to man the positions taken or to support the infantry elements from a distance. This is nonsense: to give it such a rôle, one could never have trembled with rage and impotence at a few paces from the enemy, whom he could not get at.
The machine gun should be pushed as far as possible in front of the halted line of fire. If it remains behind or abreast of the fighting line, its field of fire is generally blocked or masked by the slightest movement; in advance of the line, it will enable the infantry line to advance for some time under the cover of its fire; it is the tooth of the attack. It can move forward, its crew of a few men can creep along the smallest pathway, and a shell hole is sufficient for its shelter; in the skirmish chain a whole ditch is necessary. Will it lack ammunition, having only the boxes that the gun crew carries sometimes incomplete? No, for it has only to fire on rare occasions, for example, at the moment of assault. If it is taken, what does that matter—we will take ten from the enemy. The problem would be much simplified with a few automatic rifles.
Light Cannon.—We have spoken of the rôle of light cannon in the paragraph relating to the destruction of machine guns.