assault, or if {161} it can be got under control and the advance is to be continued, the successful troops must be reorganised within the wood (care being taken to avoid concentration in salients) and must deploy before advancing, to bound forward in one rush until clear of the wood. DEFENCE OF A WOOD.--The outer edge of a wood is particularly vulnerable, but some portions of it must of necessity be occupied for purposes of observation and resistance (particularly at night), while the unoccupied portions are heavily entangled and made subject to enfilade fire from the occupied positions, machine and Lewis guns being particularly suitable for the defensive positions, in concealed and strengthened emplacements. The perimeter should be divided into sections garrisoned by complete units under definite commanders. Lines of defence must also be established in the interior, and lateral communications opened up through the trees, with easily distinguished marks to direct troops issuing to counter-attacks, and time will be saved by making several tracks rather than one wide road. The second line of defence should contain an all-round defensive position from which all avenues of approach can be swept by machine and Lewis guns, and this position should also provide facilities for sorties to counter-attack. If the wood is too far from the Outpost Zone of the defence to serve as a factor in the scheme steps must be taken to neutralise the advantages offered to an attacking force in a concealed avenue of approach, either by the use of gas, or by bringing such a fire on the exits from the wood that a debouching enemy may suffer heavy loss or annihilation. In most cases, an attacking force will be harassed, and a show of opposition will be made, in such a wood by _fighting patrols_, and obstacles can be placed in the near edge, with entanglements outside, so planned as to induce the attacking force to collect in lanes enfiladed by machine guns. {162} THE ATTACK ON VILLAGES.--There are three phases in the attack on a village as in the attack on a wood. In the fight for the outer edge, the front will probably be harassed by a fire attack, while one or both flanks are assaulted by all four sections of the platoon, under cover of fire from machine guns and Lewis guns.