The first wave is composed of bombers and rifle grenade men, and attacks the enemy's first line of trenches. It must go straight through to its objective, following the artillery barrage as closely as possible. The second and third waves, composed of riflemen with bayonets and Lewis guns, re-enforce the first wave after the latter has occupied the enemy's first line trench, and attack the second line trench. The fourth wave takes up tools, ammunition and sand bags and assists in consolidating the line. The fifth wave is a mopping-up party to clear the enemy's dugouts. The sixth wave comprises battalion headquarters and has two Lewis guns, kept for a special purpose. The seventh and eighth waves, if used, seize and consolidate the enemy's third line trench. Bombing squads (1 non-commissioned officer and 8 men) are on the flank of each attacking wave. Battalion bombers are assigned a special task. All movements must be over the top of the ground. The pace throughout should be a steady walk, except for the last 30 or 40 yards, when the line should break into a steady double time, finishing up the last 10 yards with a rush. Barrage is continued 20 or 30 minutes after the objective has been reached. Mopping parties must be trained with great care under selected officers. They should always wear a distinguishing mark. They must at once dispose of any occupants who may have emerged from their dugouts, and picket the dugout entrances. The ultimate unit in the assault is the platoon. It must be organized and trained as a self-contained unit, capable of producing the required proportion of riflemen, bombers, rifle bombers, Lewis gunners, and carriers, all trained to work in combination. Assaulting troops should have twelve hours of daylight in the trenches before the assault begins, to enable them to get acquainted with the ground and get some rest. All ranks must be given a hot meal, including hot tea or coffee, before the assault. Take every precaution to prevent the enemy from realizing that the assault is about to take place. Bayonets must not be allowed to show. No increase in rate of artillery fire. No unusual movements must be made in the trenches, and there must be no indication of the impending assault until the barrage is dropped. When the trench has been taken, it should be consolidated at once to prevent counterattack. To protect this consolidation, throw out an outpost line, the posts consisting of one non-commissioned officer and 6 riflemen with a Lewis gun, about 150 to 200 yards apart and 100 to 300 yards beyond the line. These posts should be established in shellholes, which are to be converted into fire trenches, protected by wire entanglements, as soon as possible.