1. To assist a turning movement.
2. To reinforce a distant flank.
3. To repel a counter-attack.
4. To hold a captured position.
When the infantry reach close range, the point for the assault will have been selected and the reserves massed behind this point. When the reserves have been thrown in, and the fire fight has reached its height, the moment will have arrived when one side or the other will obtain superiority of fire. "The climax of the infantry attack is the assault which is made possible by superiority of fire."[A] To assist in the attainment of this superiority of fire is the true rôle of machine guns with infantry, and, as their beaten zone at short ranges is so small, they can safely fire over the heads of prone infantry, even when the latter are within a hundred yards of the target. The guns should now be pushed up to the closest ranges, and fire of the most rapid description concentrated on the point of assault. When it is remembered that the machine guns of a single Infantry Division, as at present organised, can bring a fire of more than ten thousand shots a minute from close range where its accuracy is assured, at this crisis, there will be no need to say any more on the tactical importance of the probable result.
In bringing machine guns into action for this purpose, they will generally be used in batteries, but may come into action in sections or even single guns once the objective has been pointed
