Elements of Military Art and Science / Or, Course Of Instruction In Strategy, Fortification, Tactics Of Battles, &C.; Embracing The Duties Of Staff, Infantry, Cavalry, Artillery, And Engineers; Adapted To The Use Of Volunteers And Militia; Third Edition; With Critical Notes On The Mexican And Crimean Wars.

by H. W. Halleck

NOTE TO CHAPTER V.—TACTICS.

The war in Mexico, from the small number of troops engaged, and the peculiar character of the ground in most cases, afforded but few opportunities for the display of that skill in the tactics of battle which has so often determined the victory upon the great fields of Europe. Nevertheless, the history of that war is not without useful lessons in the use which may be made of the several arms in the attack and defence of positions. The limit assigned to these Notes will admit of only a few brief remarks upon these battles.

The affairs of Palo Alto and Resaca de la Palma properly constitute only a single battle. In the first, which was virtually a cannonade, the lines were nearly parallel, and Arista's change of front to an oblique position during the engagement, was followed by a corresponding movement on the part of General Taylor. Being made sensible of the superiority of the American artillery, the Mexican general fell back upon the Ravine of Resaca de la Palma, drawing up his troops in a concave line to suit the physical character of the ground. The Americans attacked the whole line with skirmishers, and with dragoons supported by light artillery, and the charge of a heavy column of infantry decided the victory. General Taylor's operations at Monterey partook more of the nature of an attack upon an intrenched position than of a regular battle upon the field. No doubt Worth's movement to the right had an important influence in deciding the contest, but the separation of his column from the main body, by a distance of some five miles, was, to say the least, a most hazardous operation. The Mexicans, however, took no advantage of the opening to operate between the separate masses into which the American army was divided. The loss which the Mexicans inflicted upon us resulted more from the strength of their position than from any skilful use of their defensive works. In the battle of Buena Vista, the efforts of Santa Anna were principally directed to turning the American left. If he had concentrated his masses more upon the centre at the plateau, the success gained in the early part of the contest would probably have been decisive. The American right at La Angostura was made almost inaccessible by the deep ravines in its front, and the skilful use made of the artillery from this point enabled General Taylor to gain the victory, even after his left had been completely turned, and a portion of the volunteers had actually fled from the field.

The manner in which Scott handled his troops in the various battles on his line of march from Vera Cruz to the capital, proved him to be one of the best generals of the age. At Cerro Gordo he so completely turned Santa Anna's left as to cut off his line of retreat, and nearly destroyed his army, the general himself barely escaping capture. The turning of Valencia's position by the village of San Geronimo, at the battle of Contreras, and the charge by Riley's columns of infantry, were movements well planned and admirably executed, as were also the rapid pursuit of Santa Anna to Churubusco, and the flank and rear attacks by the brigades of Pierce and Shields. The victory of Molino del Rey was mostly won with the musket, without very material assistance from heavy artillery, and was one of the most brilliant but dearly bought achievements of the war. The assault upon Chapultepec was preceded by a long and heavy cannonade, which produced a decided moral effect upon the enemy and greatly facilitated the assault.

With respect to the battles of the Crimean war, only that of the Alma is subject to the tactical criticism of ordinary battles; those of Balaklava, Inkerman, and the Tchernaya, were of the nature of sorties made to prevent an assault of the unfinished works of defence, and to prolong the operations of the siege. They must therefore be judged as such, and not according to the ordinary rules applicable to contests in the open field. At the battle of the Alma the Russians were attacked in position, the two lines of battle being nearly parallel. According to the original plan of attack, the Turks and Bosquet's division was to turn the Russian left, while the main attack was made upon the centre. But, on account of the division of command in the allied army, there was no concert of action. The heavy column of Bosquet probably decided the victory, although the battle was general throughout the whole line. The English army advanced in columns of brigades at deploying distances, its right connected with the French, and its left protected by a line of skirmishers, of cavalry and horse artillery. With respect to the formation and use of troops in the other battles, it may be remarked that the charge of the English light cavalry at Balaklava was apparently without necessity or object, and led to its inevitable destruction. In the battle of Inkerman the Russians directed their main attack upon the English right and centre, with false attacks upon the French left and towards Balaklava. But these false attacks, as is usual in such cases, were not conducted with sufficient energy and decision, and Bosquet was thus enabled to perceive the real intentions of the enemy upon the English portion of the line and move to its assistance. Moreover, the main body of the Russians moved in too heavy and unwieldy masses, which exposed them to terrible losses, and rendered impossible a rapid and effective deployment of their numerical force. The same criticism is applicable to their formation at the battle of the Tehernaya.

NOTE TO CHAPTER VI.—MEANS OF NATIONAL DEFENCE.

On the invasion of Mexico by the United States, the former republic had a large army of tolerably good troops, though badly officered, still worse equipped, and almost destitute of proper military stores; but she was entirely wanting in two important elements of national defence—fortifications and a navy. Her weakness was shown by the rapid and easy conquest of almost the entire country.

We have already remarked that the fortifications of Russia confined the theatre of war to a single point of the Crimea, and limited the military operations of the allies to the prolonged and only partially successful siege of Sebastopol.

NOTE TO CHAPTER VII.—SEA-COAST DEFENCES.

Allusion has already been made to the weakness of Mexico, resulting from her want of sea-coast defences, as shown by the war between that republic and the United States. This would have been still more manifest had she possessed any thing like a commercial marine, exposed to capture by our naval forces. As it was, the Mexican war afforded not a single contest between ships and forts, no opposition being made to the occupation of Mexican ports by our naval force. The only coast defence, the castle of San Juan d'Ulica was not attacked, but after the bombardment and capture of Vera Cruz, it surrendered without a blow.