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Rh time on large and deep targets. Machine guns, however, are of small use to a commander fighting a protracted rifle-fire engagement.

''Para. 189.''—An engagement with a thin line of skirmishers under good cover should be avoided. It demands a heavy expenditure of ammunition which is not commensurate with the result obtained. During a lengthy rifle-fire action the detachments with their guns should be withdrawn temporarily from their position, so as to save their effect for a decisive moment.

''Para. 190.''—The engagement of hostile machine guns that offer a difficult target is by no means the chief duty of machine-gun detachments; in most cases it will be more profitable to leave this to other arms. When engaging hostile machine guns the most accurate information should be sought regarding the enemy's position.

''Para. 191.''—Machine-gun detachments can at all times and under all conditions confidently await the attacks of hostile cavalry. To meet these any formation can be adopted which allows of a well-directed and calmly delivered fire being poured into the advancing cavalry. Both when firing from the carriage and from the gun dismounted the fire must be distributed all along the advancing line of cavalry; special attention must be paid to the supporting lines, to one's own flanks, and to the defence of the carriages when the guns are separated from