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 commander of the force to put his plan of action into execution.[A]

The first duty of outposts, which is reconnaissance, cannot be assisted by machine guns; but their second duty, which is resistance, may be materially strengthened and aided by them, as we have already seen in dealing with the defence. Little can be said about tactics, and it will be necessary to use the guns in positions on the line of resistance where their fire power is most likely to be of value. In order clearly to understand where and how machine guns should be used with outposts, it will be necessary first to examine the composition and distribution of outposts of a force of all arms. Field Service Regulations, Part I., 1909, says: "When there is any possibility of a force coming in conflict with an enemy, its commander, when halting for the night, should first decide on his dispositions in case of attack, and then arrange the quartering of his command and the position of the outposts accordingly Command, co-operation, and inter-communication will be facilitated by placing the advanced troops along well-defined natural features, such as ridges, streams, the outer edges of woods, etc., or in the vicinity of roads, but this must not be allowed to outweigh the necessity for making the best tactical dispositions possible. In enclosed country, and at night, the movements of troops are generally confined to the roads and tracks, which should be carefully watched. If