MAXIM XXIX
When you have resolved to fight a battle, collect your whole force. Dispense with nothing. A single battalion sometimes decides the day.
NOTE
I think it here desirable to observe, that it is prudent before a battle to fix upon some point in rear of the reserve for the junction of the different detachments; for if, from unforeseen circumstances, these detachments should be prevented from joining before the action has commenced, they might be exposed, in case a retrograde movement should be found necessary, to the masses of the enemy. It is desirable also to keep the enemy in ignorance of these reinforcements, in order to employ them with greater effect. “A seasonable reinforcement,” says Frederick, “renders the success of a battle certain, because the enemy will always imagine it stronger than it really is, and lose courage accordingly.”
MAXIM XXX
Nothing is so rash or so contrary to principle, as to make a flank march before an army in position, especially when this army occupies heights at the foot of which you are forced to defile.
NOTE
It was by a neglect of this principle that Frederick was beaten at Kollin in the first campaign of 1757. Notwithstanding prodigies of valor, the Prussians lost fifteen thousand men and a great portion of their artillery, while the loss of the Austrians did not exceed five thousand men. The consequence of this battle was more unfortunate still, since it obliged the King of Prussia to raise the siege of Prague, and to evacuate Bohemia.
It was also by making a flank march before the Prussian army, that the French lost the disgraceful battle of Rosbach.
This imprudent movement was still more to be reprehended, because the Prince de Soubise, who commanded the French army, was so negligent as to manœuvre, without either advanced guards or flanking corps, in presence of the enemy. The result was, that his army, consisting of fifty thousand men, was beaten by six battalions and thirty squadrons. The French lost seven thousand men, twenty-seven standards, and a great number of cannon. The Prussians had only three hundred men disabled.
Thus, by having forgotten this principle, that a flank march is never to be made before an enemy in line of battle, Frederick lost his army at Kollin; and Soubise, at Rosbach, lost both his army and his honor.
MAXIM XXXI
When you determine to risk a battle, reserve to yourself every possible chance of success, more particularly if you have to deal with an adversary of superior talent; for if you are beaten, even in the midst of your magazines and your communications, wo to the vanquished!
NOTE
“We should make war,” says Marshal Saxe, “without leaving anything to hazard, and in this especially consists the talent of a general. But when we have incurred the risk of a battle, we should know how to profit by the victory, and not merely content ourselves, according to custom, with possession of the field.”
It was by neglecting to follow up the first success, that the Austrian army, after gaining the field of Marengo, saw itself compelled on the following day to evacuate the whole of Italy.
General Melas, observing the French in retreat, left the direction of the movements of his army to the chief of his staff, and retired to Alexandria to repose from the fatigues of the day. Colonel Zach, equally convinced with his general that the French army was completely broken, and consisted only of fugitives, formed the divisions in column of route.
By this arrangement, the imperial army prepared to enter upon its victorious march in a formation not less than three miles in depth.
It was near four o’clock when General Desaix rejoined the French army with his division. His presence restored in some degree an equality between the contending forces; and yet Napoleon hesitated for a moment whether to resume the offensive, or to make use of this corps to secure his retreat. The ardor of the troops to return to the charge, decided his irresolution. He rode rapidly along the front of his divisions, and addressing the soldiers – “We have retired far enough for to-day,” said he; “you know I always sleep upon the field of battle!”
The army, with unanimous shout, proclaimed to him a promise of victory. Napoleon resumed the offensive. The Austrian advance guard, panic-struck at the sight of a formidable and unbroken body presenting itself suddenly at a point where, a few moments before, only fugitives were to be seen, went to the right about, and carried disorder into the mass of its columns. Attacked immediately afterward, with impetuosity, in its front and flanks, the Austrian army was completely routed.
Marshal Daun experienced nearly the same fate as General Melas, at the battle of Torgau, in the campaign of 1760.
The position of the Austrian army was excellent. It had its left upon Torgau, its right on the plateau of Siptitz, and its front covered by a large sheet of water.
Frederick proposed to turn its right in order to make an attack upon the rear. For this purpose he divided his army into two corps, the one under the orders of Ziethen, with instructions to attack in front, following the edge of the water; the other under his own immediate command, with which he set out to turn the right of the Austrians. But Marshal Daun having had intimation of the movements of the enemy, changed his front by countermarching, and was thus enabled to repel the attacks of Frederick, whom he obliged to retreat. The two corps of the Prussian army had been acting without communication. Ziethen, in the meantime, hearing the fire recede, concluded that the king had been beaten, and commenced a movement by his left in order to rejoin him; but falling in with two battalions of the reserve, the Prussian general profited by this reinforcement to resume the offensive. Accordingly he renewed the attack with vigor, got possession of the plateau of Siptitz, and soon after of the whole field of battle. The sun had already set when the King of Prussia received the news of this unexpected good fortune. He returned in all haste, took advantage of the night to restore order in his disorganized army, and the day after the battle occupied Torgau.
Marshal Daun was receiving congratulations upon his victory, when he heard that the Prussians had resumed the offensive. He immediately commanded a retreat, and at daybreak the Austrians repassed the Elbe with the loss of twelve thousand men, eight thousand prisoners, and forty-five pieces of cannon.
After the battle of Marengo, General Melas, although in the midst of his fortresses and magazines, saw himself compelled to abandon everything, in order to save the wreck of his army.
General Mack capitulated after the battle of Ulm, although in the centre of his own country.
The Prussians, in spite of their depôts and reserves, were obliged, after the battle of Jena, and the French after that of Waterloo, to lay down their arms.
Hence, we may conclude that the misfortune that results from the loss of a battle, does not consist so much in the destruction of men and of materiel as in the discouragement which follows this disaster. The courage and confidence of the victors augment in proportion as those of the vanquished diminish; and whatever may be the resources of an army, it will be found that a retreat will degenerate rapidly into a rout unless the general-in-chief shall succeed, by combining boldness with skill, and perseverance with firmness, in restoring the morale of his army.
MAXIM XXXII
The duty of an advanced guard does not consist in advancing or retiring, but in manœuvring. An advanced guard should be composed of light cavalry, supported by a reserve of heavy cavalry, and by battalions of infantry, supported also by artillery. An advanced guard should consist of picked troops, and the general officers, officers and men, should be selected for their respective capabilities and knowledge. A corps deficient in instruction is only an embarrassment to an advanced guard.
NOTE
It was the opinion of Frederick that an advanced guard should be composed of detachments of troops of all arms. The commander should possess skill in the choice of ground, and he should take care to be instantly informed, by means of numerous patrols, of everything passing in the enemy’s camp.
In war, it is not the business of an advanced guard to fight, but to observe the enemy, in order to cover the movements of the army. When in pursuit, the advanced guard should charge with vigor, and cut off the baggage and insulated corps of the retiring enemy. For this purpose, it should be reinforced with all the disposable light cavalry of the army.
MAXIM XXXIII
It is contrary to the usages of war to allow parks or batteries of artillery to enter a defile, unless you hold the other extremity. In case of retreat, the guns will embarrass your movements and be lost. They should be left in position, under a sufficient escort, until you are master of the opening.
NOTE
Nothing encumbers the march of an army so much as a quantity of baggage. In the campaign of 1796, Napoleon abandoned his battering train under the walls of Mantua, after spiking the guns and destroying the carriages. By this sacrifice, he acquired a facility of manœuvring rapidly his little army, and obtained the initiative as well as a general superiority over the numerous but divided forces of Marshal Wurmser.
In 1799, during his retreat in Italy, General Moreau being compelled to manœuvre among the mountains, preferred separating himself entirely from his reserve artillery, which he directed upon France by the Col de Fenestrelle, rather than embarrass his march with this part of his equipment.
These are the examples we should follow; for if, by a rapidity of march, and a facility of concentration upon decisive points, the victory is gained, the materiel of an army is soon re-established. But if, on the other hand, we are beaten and compelled to retreat, it will be difficult to save our equipments, and we may have reason to congratulate ourselves that we abandoned them in time to prevent them from augmenting the trophies of the enemy.
MAXIM XXXIV
It should be laid down as a principle, never to leave intervals by which the enemy can penetrate between corps formed in order of battle, unless it be to draw him into a snare.
NOTE
In the campaign of 1757, the Prince of Lorraine, who was covering Prague with the Austrian army, perceived the Prussians threatening, by a flank movement, to turn his right. He immediately ordered a partial change of front by throwing back the infantry of that wing, so as to form a right angle with the rest of the line. But this manœuvre being executed in presence of the enemy, was not effected without some disorder. The heads of the columns having marched too quick, caused the rear to lengthen out, and when the line was formed to the right, a large interval appeared at the salient angle. Frederick, observing this error, hastened to take advantage of it. He directed his centre corps, commanded by the Duke of Bevern, to throw itself into this opening, and by this manœuvre decided the fate of the battle.
The Prince of Lorraine returned to Prague, beaten and pursued, with the loss of sixteen thousand men and two hundred pieces of cannon.
It should be observed at the same time, that this operation of throwing a corps into the intervals made by an army in time of battle, should never be attempted unless you are at least equal in force, and have an opportunity of outflanking the enemy on the one side or the other; for it is then only you can hope to divide his army in the centre, and insulate the wings entirely. If you are inferior in number, you run the risk of being stopped by the reverses, and overpowered by the enemy’s wings, which may deploy upon your flanks and surround you.
It was by this manœuvre that the Duke of Berwick gained the battle of Almanza, in the year 1707, in Spain.
The Anglo-Portuguese army, under the command of Lord Galloway, came to invest Villena. Marshal Berwick, who commanded the French and Spanish army, quitted his camp at Montalegre, and moved upon this town to raise the siege. At his approach, the English general, eager to fight a battle, advanced to meet him in the plains of Almanza. The issue was long doubtful. The first line, commanded by the Duke of Popoli, having been broken, the Chevalier d’Asfeldt, who had charge of the second, drew up his masses with large intervals between them; and when the English, who were in pursuit of the first line, reached these reserves, he took advantage of their disorder to attack them in flank and defeated them entirely.
Marshal Berwick, perceiving the success of this manœuvre, threw open his front, and deploying upon the enemy’s flanks, while the reserve sustained the attack in front, and the cavalry manœuvred in their rear, obtained a complete victory.
Lord Galloway, wounded and pursued, collected with difficulty the remains of his army, and took shelter with them in Tortosa.
MAXIM XXXV
Encampments of the same army should always be formed so as to protect each other.
NOTE
At the battle of Dresden, in the campaign of 1813, the camp of the allies, although advantageously placed upon the heights on the left bank of the Elbe, was nevertheless extremely defective, from being traversed longitudinally by a deep ravine, which separated the left wing completely from the centre and the right. This vicious arrangement did not escape the penetrating eye of Napoleon. He instantly directed the whole of his cavalry and two corps of infantry against the insulated wing, attacked it with superior numbers, overthrew it, and took ten thousand prisoners, before it was possible to come to its support.
MAXIM XXXVI
When the enemy’s army is covered by a river, upon which he holds several têtes de pont, do not attack in front. This would divide your force and expose you to be turned. Approach the river in echelon of columns, in such a manner that the leading column shall be the only one the enemy can attack, without offering you his flank. In the meantime, let your light troops occupy the bank, and when you have decided on the point of passage, rush upon it and fling across your bridge. Observe that the point of passage should be always at a distance from the leading echelon, in order to deceive the enemy.
NOTE
If you occupy a town or a village on the bank of a river, opposite to that held by the enemy, it is an advantage to make this spot the crossing point, because it is easier to cover your carriages and reserve artillery, as well as to mask the construction of your bridge, in a town, than in the open country. It is also a great advantage to pass a river opposite a village, when the latter is only weakly occupied by the enemy; because as soon as the advanced guard reaches the other side, it carries this post, makes a lodgment, and by throwing up a few defensive works, converts it easily into a tête de pont. By this means, the rest of the army is enabled to effect the passage with facility.
MAXIM XXXVII
From the moment you are master of a position which commands the opposite bank, facilities are acquired for effecting the passage of the river; above all, if this position is sufficiently extensive to place upon it artillery in force. This advantage is diminished, if the river is more than three hundred toises (or six hundred yards) in breadth, because the distance being out of the range of grape, it is easy for the troops which defend the passage to line the bank and get under cover. Hence it follows that if the grenadiers, ordered to pass the river for the protection of the bridge, should reach the other side, they would be destroyed by the fire of the enemy; because his batteries, placed at the distance of two hundred toises from the landing, are capable of a most destructive effect, although removed above five hundred toises from the batteries of the crossing force. Thus the advantage of the artillery would be exclusively his. For the same reason, the passage is impracticable, unless you succeed in surprising the enemy, and are protected by an intermediate island, or, unless you are able to take advantage of an angle in the river, to establish a crossfire upon his works. In this case, the island or angle forms a natural tête de pont, and gives the advantage in artillery to the attacking army.
When a river is less than sixty toises (or one hundred and twenty yards) in breadth, and you have a post upon the other side, the troops which are thrown across derive such advantages from the protection of your artillery, that, however small the angle may be, it is impossible for the enemy to prevent the establishment of a bridge. In this case, the most skilful generals, when they have discovered the project of their adversary, and brought their own army to the point of crossing, usually content themselves with opposing the passage of the bridge, by forming a semicircle round its extremity, as round the opening of a defile, and removing to the distance of three or four hundred toises from the fire of the opposite side.
NOTE
Frederick observes, that “the passage of great rivers in the presence of the enemy is one of the most delicate operations in war.” Success on these occasions depends on secrecy, on the rapidity of the manœuvres, and the punctual execution of the orders given for the movements of each division. To pass such an obstacle in presence of an enemy, and without his knowledge, it is necessary not only that the previous dispositions should be well conceived, but that they should be executed without confusion.
In the campaign of 1705, Prince Eugene, of Savoy, wishing to come to the assistance of the Prince of Piedmont, sought for a favorable point at which to force the passage of the Adda, defended at that time by the French army, under the command of the Duke de Vendome.
After having selected an advantageous situation, Prince Eugene erected a battery of twenty pieces of cannon on a position which commanded the entire of the opposite bank, and covered his infantry by a line of entrenched parallels constructed on the slope of the declivity.
They were working vigorously at the bridge, when the Duke de Vendome appeared with his whole army. At first he seemed determined to oppose its construction, but after having examined the position of Prince Eugene, he judged this to be impracticable.
He therefore placed his army out of reach of the prince’s batteries, resting both his wings upon the river, so as to form a bow, of which the Adda was the cord. He then covered himself with entrenchments and abattis, and was thus enabled to charge the enemy’s columns whenever they debouched from the bridge, and to beat them in detail.
Eugene, having reconnoitred the position of the French, considered the passage impossible. He therefore withdrew the bridge, and broke up his camp during the night.
It was by this manœuvre, also, that, in the campaign of 1809, the Archduke Charles compelled the French to reoccupy the isle of Lobau, after having debouched on the left bank of the Danube. The march of the Archduke Charles was wholly concentric. He menaced Grosaspern with his right, Esling with his centre, and Enzersdorf with his left.
His army, with both wings resting on the Danube, formed a semicircle around Esling. Napoleon immediately attacked and broke the centre of the Austrians; but after having forced their first line, he found himself arrested by the reserves. In the meantime, the bridges upon the Danube had been destroyed, and several of his corps, with their parks of artillery, were still on the right bank. This disappointment, joined to the favorable position of the Austrians, decided Napoleon to re-enter the isle of Lobau, where he had previously constructed a line of field-works, so as to give it all the advantages of a well entrenched camp.