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to be avoided when possible.

When necessary to traverse or to occupy such ground, precautions must be taken to protect the reserves or other bodies of troops by placing them on the flanks; by disposing them in formations with a narrow front; by causing them to lie down; by the construction of suitable shelter, and by avoiding useless movements.

Adjustment of Fire

1428. Fire at stationary targets. The correct adjustment of fire is attained by causing the center of impact to fall on the center of the target. This is the problem constantly presented in combat firing.

The two important elements entering into this problem are, (1) the commander and (2) the troops. When a body of troops has aimed correctly at the target indicated, with the elevation ordered and has fired with steadiness, it has done all that can be expected of it, but that is not sufficient; for, if the commander, by giving the wrong sight-setting, for example, has failed to cause the center of impact to fall on the center, of the target, the result may be nothing. Hence the vital importance of knowing and announcing the correct range.

It is known that good shots make a small group and poor shots a large group, average shots making a group of intermediate size.

It is frequently stated that troops composed of good shots are not so effective in collective firing as poorer shots. How is this possible? The explanation is simple. The shot group of the good shots is small and if misplaced by an error in range estimation few hits result while the shot group of poorer shots, being larger, is not so much affected by the same error in range estimation, will cover the ground, and probably hit more figures. This, of course, is only true when a considerable error has been made in estimating the range.

As battle targets are mostly line targets, a displacement to the right or left does not amount to much, but an error in depth (range), as stated before, is serious. Thus we, see that the correct determination of the range is very important.

1429. Determination of range. The range may be determined, with only a small error, by a range finder. There are several other methods, as, for instance, by trial shots,—the dust thrown up by the bullet showing whether the range is too short or too great,—by sound, by the appearance of objects, etc., but except in deliberately prepared defensive positions, estimating by eye will be the most practicable method of estimating the range. For all practical purposes a very satisfactory result will be obtained by taking the average estimates of several trained men.

In observing the effect of the fire the ground may be wet, or covered with turf, sod or brush in which no signs of striking shots can be seen. By careful use of good field glasses some indication of the place where the shots are going, may be obtained. The actions of the enemy may often indicate whether the fire is effective or not.

1430. Combined sights. All other means failing, combined sights may be resorted to. By this is meant firing part of the troops with sights set at one range and part with a range greater or less by 100 yards or more. This increases the beaten zone and will generally assure a certain amount of fire effect. This method is seldom used under 500 yards.

1431. Auxiliary aiming points. It frequently happens that the target is so well concealed that it is invisible. In this case some well defined object in front or behind it must be used as an aiming target, and the range given so that the beaten zone will include the actual target at its center.

1432. Fire at moving targets. In firing at a moving enemy, a beaten zone must be established immediately in front, his forward movement into this zone completing the adjustment of fire. Due to the chance of overestimating the range, a sight-setting must be taken well under the estimated range (usually about 200 yards against advancing infantry).

When the fire becomes effective, as may be judged by the actions and movements of the enemy, the rate of fire should be quickened in order to increase the effect of the fire.

Frequent changes of sight not only cause a loss of time, but they also multiply chances of error in sight-setting. Changes in sight-setting against advancing infantry should not be less than 200 yards at a time, that is to say, when the enemy has passed through the zone of effective fire, the sight should be lowered 200 yards and the operation repeated until the battle-sight zone is reached, when the rear-sight leaf is thrown down and no other sight manipulation is made.

Against skirmish lines advancing by rushes, the sight-setting should not be changed during a rush, but it should be done at the halts, so that the greater vulnerability of the targets presented during the rush may be taken advantage of.

Against retreating infantry, use the estimated range, and when the target appears to have passed beyond the zone of effective fire, add 200 yards to the sight-setting.

Against attacking cavalry, due to the rapidity of the advance, there will not usually be time for sight manipulation other than throwing down the rear-sight leaf, so that the battle should be resorted to at all ranges.

In firing at a target moving across the line of fire it is desirable, on account of the confusion caused thereby, to hit the head of the column. It is necessary, therefore, to hold to the front a distance sufficient to allow for the time of flight and the rate of march. This will be accomplished by the observance of the following rough rules:

1. Against infantry, hold against the head of the marching column;

2. Against cavalry at a trot, hold to the front 1 yard for every 100 yards of range; and at a gallop, 2 yards for every 100 yards of range.

1433. Night firing. In night firing it is almost impossible to adjust the fire by ordinary means.

In night attacks the purpose of the offensive is to gain rapidly and quietly a position where the issue may be decided in a hand to hand encounter, or a position from which the superiority of fire may be gained at daylight. For the offensive, therefore, fire action is a subordinate consideration.

On the defensive, when a night attack is apprehended, preparations should be made to sweep with fire the ground immediately in front over which the assailant must advance.

Special arrangements may sometimes be made for resting rifles on the parapet, so that the ground in front will be suitably covered. A solid support is necessary for maintaining the proper direction of the pieces during firing. For this purpose notched boards or timbers are convenient. The arrangements should be such that the operations of loading and firing may be performed without removing the rifles from the support.

Searchlight illumination may reveal the position and movements of the enemy sufficiently well to permit the use of the sights. In night operations of small parties fire may be well directed when a bright, well-defined light, such as a camp fire, is presented as an aiming point. In such a case a slight illumination of the front sight is required.

Fire Direction and Control

1434. General. As stated before in substance, the maximum effect of fire can be gotten only by instructed and disciplined troops under a commander capable of directing and controlling their fire properly.

The fire of a company may be likened to spraying water from a hose, and as the fireman can shift his stream of water from one point to the other with certainty, being able to direct and control it with promptness and accuracy, so should the company commander be able to switch the cone of fire of his company from one target to another, having it at all times under direction and control. In other words, as the pliable, manageable hose responds to the will of the fireman, so should the company be so trained and instructed that it will respond to the will of the company commander on the firing line, in the midst of the noise and confusion of battle. No one except a man who has been in battle can realize how great are the noise and confusion, and how necessary and important are coöperation, team-work, discipline, and communication, in order for a company commander to control and direct the fire of the company—there must be absolute coöperation, team-work, and communication between all parts of the company—between the captain and the platoon leaders, the platoon leaders and the squad leaders, and the squad leaders and the members of their squads. Each and every man must know and do his part and endeavor all he can to keep in touch with and help the others. Now, the foundation of team-work and coöperation, is communication—communication between the company commander and the men on the firing line—the means by which, the medium through which he will make known his will to the men on the firing line. As stated before, because of the noise and confusion on the firing line this is no easy matter. The ideal way would be for the company commander to control the company by communicating direct with every man on the firing line, as graphically shown on the following page:

Fig. 49 Fig. 49

However, in the noise and confusion of battle it would be utterly impossible for all the men to hear the captain's voice. Experience shows that from 20 to 35 rifles are as many as one leader can control. The captain, must, therefore, control the company through the platoon commanders—that is to say, he actually directs the fire and the platoon commanders, assisted by the squad leaders, actually control it. In other words, the captain communicates with the men on the firing line, he makes his will known to them, through his platoon commanders, as graphically shown in this diagram:

Fig. 50 Fig. 50

However, in order for our system of communication to be successful, each and every man, as stated above, must know and do his part and endeavor all he can to help the others. If this is done, then the different parts and elements of the company will dove-tail and fit into one another, resulting in a complete, homogeneous whole, in the form of an efficient, pliable, manageable instrument in the hands of the company commander. And this is the object, the result, sought by practice and instruction in field firing, and which will be obtained if the captain, the platoon leaders, the squad leaders, the file closers, the musicians, and the privates, will perform the following duties and functions:

1435. The Captain. (Fire direction.)

The captain directs the fire of the company or of designated platoons. He designates the target, and, when practicable, allots a part of the target to each platoon. Before beginning the fire action he determines the range, announces the sight setting, and indicates the class of fire to be employed, and the time to open fire. Thereafter, he observes the fire effect, corrects material errors in sight setting, prevents exhaustion of the ammunition supply, and causes the distribution of such extra ammunition as may be received from the rear. (I. D. R. 249.)

Having indicated clearly what he desires the platoon leaders to do, the captain avoids interfering, except to correct serious errors or omissions. (I. D. R. 240.)

1436. The Platoon Leaders. (Fire direction.)

In combat the platoon is the fire unit. (I. D. R. 250.)

Each platoon leader puts into execution the commands or directions of the captain, having first taken such precautions to insure correct sight setting and clear description of the target or aiming point as the situation permits or requires; thereafter, he gives such additional commands or directions as are necessary to exact compliance with the

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