The first trench conquered, the line should be reformed lying down ten metres beyond the trench. Each man arriving on this new line should open fire against the defenders of the second trench. When the line is reformed, it should start the attack again as before.
The following trenches are crossed without interruption, always advancing.
For the first wave, there is no limit; let it go through as far as possible. On the 9th of May, the first line ran without stopping as far as the cemetery of Neuville, La Folie Woods, and the first houses of Souchez.
The second wave should start forward at the moment the first line reaches the hostile trenches. If it starts sooner, it will unite with the first at the entanglement and be involved in the fight for the first trench; it will be broken up prematurely, and from the moment that it is no longer a separate mass, it cannot be considered as a reinforcement.
While the first wave drives straight ahead, and can do nothing against the surprises of the enemy, the second and third waves, warned by what happens to the first, can thus take certain precautions without diminishing their élan, such as obliquing the sections that would be exposed to the fire of machine guns not yet out of action.
The reinforcement by successive waves of entire companies leads to a vexatious mixture of units. It is necessary that the surviving officers and noncommissioned officers group around them men of their own company but not miscellaneous units.
Instruction of the First Line.
The assault being the most severe phase of the combat, it is necessary, in order to face it and push it through, that the will of each individual be transformed largely by habits and reflexes. Therefore, hold each day an assault exercise over ground which resembles in detail that over which the real assault will have to be made.
The points which should be borne in mind are as follows:
The Alignment.—Be particularly strict on this question; its extreme importance is recognized. See that the line is extremely well dressed during the execution of the rushes.