ground is favourable the gun may with advantage accompany that portion of reserves told off to cover the advance of the remainder by long-range fire. Machine guns will co-operate with the attacking infantry in the decisive fire action in endeavouring to obtain a superiority of fire. Positions on the flank of the attacking battalions or on commanding ground, if available, should be selected, as they admit of the guns remaining in action whilst the firing line is pushing forward. A position on the flank of the attacking infantry has the further advantages that oblique or flanking fire, which from machine guns is particularly effective, can be brought to bear against the enemy, whilst guns so placed are less likely to draw fire upon the attacking infantry. A change of position during the decisive fire action interrupts the fire and entails fresh laying and ranging, and therefore should be seldom resorted to unless an increased fire effect is to be obtained. At the decisive stage of the attack, fire of the greatest intensity should be continued as long as is compatible with the safety of the advancing firing line. In the event of the attack succeeding, the guns should be pushed forward at once in order to pursue the retreating enemy with their fire. In the event of failure, every effort should be made to cover the retirement of the firing line. They will assist in repelling counter-attacks to which the firing line may suddenly become exposed, and in the protection
