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rivulet of Papelotte, were serious obstacles against the attacking force; but the marshy forest of Soignies in rear, with but a single road, cut off all hope of retreat.

II. According to the strategic relations of the contending forces in a campaign, will it be determined whether we are to await the enemy, or to seek him out and attack him wherever he may be found. We may sometimes be obliged to make the attack at all hazards, for the purpose of preventing the junction of two corps, or to cut off forces that may be separated from the main body by a river, &c. As a general rule the attacking force has a moral superiority over the defensive, but this advantage is frequently more than counterbalanced by other conditions.

The main thing in an offensive battle is to seize upon the decisive point of the field. This point is determined by the configuration of the ground, the position of the contending forces, the strategic object of the battle; or, by a combination of these. For example, when one wing of the enemy rests on a height that commands the remainder of his line, this would seem the decisive point to be attacked, for its occupation would secure the greatest advantages; but this point may be so very difficult of access, or be so related to the strategic object as to render its attack out of the question. Thus it was at the battle of Bautzen: the left of the allies rested on the mountains of Bohemia, which were difficult of attack, but favorable for defence; moreover, their only line of retreat was on the right, which thus became the point of attack for the French, although the topographical and tactical key of the field was on the left.

III. It frequently happens in modern warfare that battles result from the meeting of armies in motion, both parties acting on the offensive. Indeed, an army that is occupying a defensive position may, on the approach of the enemy, advance to meet him while on the march. Battles of this kind may partake of the mixed character of offensive and defensive actions, or they may be of the nature of a surprise to both armies. To this class belong the battles of Rosbach, Eylau, Lutzen, Luzzara, Abensberg, &c.

Surprises were much more common in ancient than in modern times, for the noise of musketry and the roar of artillery, belonging to the posts or wings assailed, will prevent any general surprise of an army. Moreover, the division into separate masses, or corps d'armée, will necessarily confine the surprise to a part, at most, of the forces employed. Nevertheless, in the change given to military terms, a surprise may now mean only an unexpected combination of manœuvres for an attack, rather than an actual falling upon troops unguarded or asleep. In this sense Marengo, Lutzen, Eylau, &c. are numbered with surprises. Benningsen's attack on Murat at Zarantin in 1812 was a true surprise, resulting from the gross negligence and carelessness of the king of Naples.

An order of battle is the particular disposition given to the troops for a determined manœuvre on the field of battle. A line of battle is the general name applied to troops drawn up in their usual order of exercise, without any determined manœuvre; it may apply to defensive positions, or to offensive operations, where no definitive object has been decided on. Military writers lay down twelve orders of battle, viz.: 1st. The simple parallel order; 2d. The parallel order with a crotchet; 3d. The parallel order reinforced on one or both wings; 4th. The parallel order reinforced on the centre; 5th. The simple oblique order; 6th. The oblique order reinforced on the assailing wing; 7th. The perpendicular order on one or both wings; 8th. The concave order; 9th. The convex order; 10th. The order by echelon on one or both wings; 11th. The order by echelon on the centre; 12th. The combined orders of attack on the centre and one wing at the same time.

(Figure 14.)[10] The simple parallel order is the worst possible disposition for a battle, for the two parties here fight with equal chances, and the combat must continue till accident, superior numbers, or mere physical strength decides the day; skill can have little or no influence in such a contest.

[10]

In the plans, B is the army in position, and A the attacking force arranged according to the different orders of battle. To simplify the drawings, a single line represents the position of an army, whereas, in practice, troops are usually drawn up in three lines. Each figure represents a grand division of twelve battalions.

(Figure 15.) The parallel order with a crotchet on the flank, is sometimes used in a defensive position, and also in the offensive with the crotchet thrown forward. Malplaquet, Nordlingen, Prague, and Kolin, are examples of this order. Wellington, at Waterloo, formed the parallel order with the retired crotchet on the right flank.

(Figure 16.) A line of battle parallel to the enemy's, if strongly reinforced on one point, is according to correct principles, and may in certain cases secure the victory; but it has many inconveniences. The weak part of the line being too near the enemy, may, notwithstanding its efforts to the contrary, become engaged, and run the risk of a defeat, and thereby counterbalance the advantages gained by the strong point. Moreover, the reinforced part of the line will not be able to profit by its success by taking the enemy's line in flank and rear, without endangering its connection with the rest of the line.

(Figure 17) represents the parallel order reinforced on the centre. The same remarks are applicable to this as to the preceding.

These two orders were frequently used by the ancients: as at the battle of Zama, for example; and sometimes by modern generals. Turenne employed one of them at Ensheim.

(Figure 18) is the simple oblique order.

(Figure 19) is the oblique order, with the attacking wing reinforced. This last is better suited for an inferior army in attacking a superior, for it enables it to carry the mass of its force on a single point of the enemy's line, while the weak wing is not only out of reach of immediate attack, but also holds the remainder of the enemy's line in check by acting as a reserve ready to be concentrated on the favorable point as occasion may require.

The most distinguished examples under this order are the battles of Leuctra and Mantinea, under the celebrated Epaminondas; Leuthen, under Frederick; the Pyramids, Marengo, and Jena, under Napoleon.

(Figure 20.) An army may be perpendicular upon a flank at the beginning of a battle, as was the army of Frederick at Rosbach, and the Russian army at Kunersdorff; but this order must soon change to the oblique. An attack upon both wings can only be made when the attacking force is vastly superior. At Eylau, Napoleon made a perpendicular attack on one wing at the same time that he sought to pierce the enemy's centre.

(Figure 21.) The concave order may be used with advantage in certain cases, and in particular localities. Hannibal employed it at the battle of Cannæ, the English at Crecy and Agincourt, and the Austrians at Essling, in 1809.

(Figure 22.) The convex order is sometimes formed to cover a defile, to attack a concave line, or to oppose an attack before or after the passage of a river. The Romans formed this order at the battle of Cosilinum; the French at Ramilies in 1706, at Fleurus in 1794, at Essling in 1809, and at the second and third days of Leipsic in 1813, and at Brienne in 1814.

(Figure 23.) The order by echelon on one wing may be frequently employed with advantage; but if the echelon be made on both wings, there is the same objection to its use as to the perpendicular order on both wings. At Dresden, Napoleon attacked both wings at the same time; this is the only instance in his whole history of a similar attack, and this was owing to peculiar circumstances in the ground and in the position of his troops.

(Figure 24.) The echelon order on the centre alone may be employed with success against an army formed in a thin or too extended line of battle, for it would be pretty certain to penetrate and break the line.

The echelon order possesses in general very great advantages. The several corps composing the army may manœuvre separately, and consequently with greater ease. Each echelon covers the flank of that which precedes it; and all may be combined towards a single object, and extended with the necessary ensemble. At the battle of the Pyramids, Napoleon formed the oblique order in echelon by squares. Portions of his forces were arranged in echelon in some of his other battles.

(Figure 25.) The combined order in columns on the centre and one extremity at the same time, is better suited than either of the preceding for attacking a strong contiguous line. Napoleon employed this order at Wagram, Ligny, Bautzen, Borodino, and Waterloo.

It is impossible to lay down, as a general rule, which of these orders of battle should be employed, or that either should be exclusively followed throughout the whole battle. The question must be decided by the general himself on the ground, where all the circumstances may be duly weighed. An order well suited to one position might be the worst possible in another. Tactics is in this respect the very reverse of strategy—the latter being subject to more rigid and invariable rules.

But whatever the plan adopted by the attacking force, it should seek to dislodge the enemy, either by piercing or turning his line. If it can conceal its real intentions, and deceive him respecting the true point of attack, success will be more certain and decisive. A turning manœuvre may frequently be employed with advantage at the same time with the main attack on the line. The operations of Davoust at Wagram, and Richepanse at Hohenlinden, are good examples under this head. The manœuvre is, however, a difficult one, and unless executed with skill, may lead to disasters like the turning manœuvres of the Austrians at Rivoli and Austerlitz, and of the French under Jourdan at Stackach, and under Marmont at Salamanca.

We will now discuss the particular manner of arranging the troops on the line of battle, or the manner of employing each arm, without entering, however, much into the detailed tactics of formation and instruction.

We shall begin with infantry, as the most important arm on the battle-field.

There are four different ways of forming infantry for battle: 1st, as tirailleurs, or light troops; 2d, in deployed lines; 3d, in lines of battalions, ployed on the central division of each battalion, or formed in squares; 4th, in deep masses.

These different modes of formation are reduced to four separate systems: 1st, the thin formation of two deployed lines; 2d, a line of battalions in columns of attack on the centre, or in squares by battalions; 3d, a combination of these two, or the first line deployed, and the second in columns of attack; and 4th, the deep formation of heavy columns of several battalions. The tirailleurs are merely accessories to the main forces, and are employed to fill up intervals, to protect the march of the columns, to annoy the enemy, and to manœuvre on the flanks.

1st. Formerly the line of battle for infantry was very generally that of two deployed lines of troops, as shown in Fig. 26. But reason and experience have demonstrated that infantry in this thin or light order, can only move very slowly; that in attempting rapid movements it breaks and exhibits great and dangerous undulations, and would be easily pierced through by troops of a deeper order. Hence it is that the light formation is only proper when the

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