5. The men will, without word of command, turn about and take 4 paces to their rear, ground arms, take off their accoutrements, and lie down until ordered to begin work. 6. To avoid accidents every man must commence digging on the left of his task, and work from left to right. _Filling in trenches._ Trenches should never be filled in on the day on which they have been made, but a fatigue party should be sent out later for the special purpose of levelling them. Defaulters might be employed on this duty. In one hour a man should be expected to fill in about 40 cubic feet. PART III. BATTALION, BRIGADE, AND DIVISION DRILL. BATTALION DRILL. =91.= GENERAL RULES. 1. _Object of battalion drill._--The instruction of the soldier is brought to a conclusion in the ranks of the company. It is necessary, however, that the companies should be drilled in battalion in order that the officers commanding companies may learn to work in unison. 2. _Application of company drill._--Battalion movements are carried out by combination of companies, moving as described in Company Drill. 3. _Mounted officers._--The commanding officer, the second in command, and the adjutant will be mounted. When the battalion is acting independently, the commanding officer, accompanied by the adjutant, who will act as his orderly officer, will place himself where he can best exercise supervision. When the battalion is in brigade in column or quarter column the commanding officer will be ten paces in advance of the centre of the leading company, the adjutant being one-and-a-half horse’s lengths in rear, and half a horse’s length to the right of the commanding officer. In all movements the second in command will be responsible for the direction and covering; he (and the serjeant-major, if no ammunition carts are present) will generally assist the commanding officer. If a third field officer be present he should generally assist the second in command, unless detailed by the commanding officer for any other purpose. When a battalion is on the move, the second in command will place himself in a position from which he can best superintend the direction of the advance and the covering of the squad commanders on the directing flanks. 4. Ranks will be changed as in Company Drill, S. =63=. 5. Except where laid down, the double march is not to be used by companies during the interior movements of a battalion, unless ordered by the commanding officer. 6. If companies move into column or quarter column from both flanks they will pass each other left arm to left arm. 7. In order to practise the battalion in brigade movements, and to give the field officers experience in handling several companies, the battalion will occasionally be divided into two battalions, each of four companies, or of eight companies in single rank.