As soon as a section begins to fire, it becomes possible for it to practise the lessons in the use of fire which were learnt in Exercise III., such as concentration and distribution of fire. From one position the commander must choose his next fire position, and work his section up to it in whatever way is most suitable. On flat and open ground this position may simply be the halting place of the next rush, thirty or forty paces to the front, but it is more instructive and practical to have positions far enough from each other, say one hundred and fifty or two hundred yards, to necessitate the advancing section making several successive rushes and using various devices to gain ground without attracting the enemy’s attention. Practise sections in all ways of advancing from one position to another, as was done before firing began, and encourage the use of covered ways. This exercise, if properly done, represents what the section would have to do in battle. For the purpose of instruction, the unit commanders should be allowed to move about as instructors, but when all ranks have been through the exercise and know what is needed, you should practise it under service conditions, and tell unit commanders to behave as if under fire; this is important, as it lets all see how much will be asked of the individual man under fire, and how difficult it is to exercise any wide control. For the same reason you must in this exercise begin the practice of ordering casualties of leaders, and carry it on through the whole of the rest of the training. Order section commanders to be casualties, and let the next senior man carry on, then order that man to become a casualty, and let the next one take command. Collect these casualties with you and let them go round with you, and have for a time the onlooker’s view of the game. Do not stint in ordering them, but let every man be ready to take up command. This readiness to assume command and to carry on the advance in spite of the absence of leaders is most valuable in battle and on parade for training, keeps men’s attention fixed on the business, and helps to counteract disorder when companies and sections get mixed up in reinforcement in battalion attack. Under six hundred yards let the men use individual fire, choosing their own targets; at this time try to get them into the way of looking for the targets which most require to be shot at at the moment—they must be always looking along the enemy’s line, and must not acquire the paralysing habit of only seeing straight in front of themselves. Call on unit commanders to keep in view the question of expenditure of ammunition. It is no good ordering men to snap-fire 200 times in the course of an advance when they would only have 100 rounds in their pouches on service, and no means of getting more; when blank is being used they should see that the ammunition of casualties is collected and redistributed.