General Taylor to the Adjutant-General of the Army.
To Headquarters, Army of Occupation,
Agua Nueva, March 6, 1847.
To
The Adjutant-General of the Army,
Washington, D. C.
Sir: I have the honor to submit a detailed report of the operations of the forces under my command, which resulted in the engagement of Buena Vista, the repulse of the Mexican army, and the re-occupation of this position.
The information which reached me of the advance and concentration of a heavy Mexican force in my front, had assumed such a probable form, as to induce a special examination far beyond the reach of our pickets to ascertain its correctness. A small party of Texan spies, under Major McCulloch, dispatched to the hacienda of Encarnacion, thirty miles from this, on the route to San Louis Potosi, had reported a cavalry force of unknown strength at that place. On the 20th of February, a strong reconnoissance under Lieutenant-Colonel May was dispatched to the hacienda of Heclionda, while Major McCulloch made another examination of Encarnacion. The result of these expeditions left no doubt that the enemy was in large force at Encarnacion, under the orders of General Santa Anna, and that he meditated a forward movement, and attack upon our position.
As the camp of Agua Nueva could be turned on either flank, and as the enemy's force was greatly superior to our own, particularly in the arm of cavalry, I determined, after much consideration, to take up a position about eleven miles in rear, and there await the attack. The army broke up its camp and marched at noon on the 21st, encamping at the new position a little in front of the hacienda of Buena Vista. With a small force I proceeded to Saltillo, to make some necessary arrangements for the defence of the town, leaving Brigadier-General Wool in the immediate command of the troops.
Before those arrangements were completed, on the morning of the 22d, I was advised that the enemy was in sight, advancing. Upon reaching the ground, it was found that his cavalry advance was in our front, having marched from Encarnacion, as we have since learned, at eleven o'clock on the day previous, and driving in a mounted force, left Agua Nueva to cover the removal of public stores. Our troops were in position, occupying a line of remarkable strength. The road at this point becomes a narrow defile, the valley on its right being rendered quite impracticable for artillery by a system of deep and impassable gullies, while on the left a succession of rugged ridges and precipitous ravines extends far back toward the mountain which bounds the valley. The features of the ground were such as nearly to paralyze the artillery and cavalry of the enemy, while his infantry could not derive all the advantages of its numerical superiority. In this position we prepared to receive him. Captain Washington's battery (4th Artillery) was posted to command the road, while the 1st and 2d Illinois regiments, under Colonels Hardin and Bissell, each eight companies (to the latter of which was attached Captain Conner's company of Texas Volunteers), and the 2d Kentucky, under Colonel McKee, occupied the crests of the ridges on the left and in rear. The Arkansas and Kentucky regiments of cavalry, commanded by Colonels Yell and H. Marshall, occupied the extreme left near the base of the mountain, while the Indiana brigade, under Brigadier-General Lane (composed of the 2d and 3d regiments, under Colonels Bowles and Lane), the Mississippi riflemen, under Colonel Davis, the squadrons of the 1st and 2d Dragoons, under Captain Steen and Lieutenant-Colonel May, and the light batteries of Captains Sherman and Bragg, 3d Artillery, were held in reserve.
At eleven o'clock I received from General Santa Anna the following summons to surrender at discretion:
"Camp at Encantada, February 22d, 1847.
"To
"General Z. Taylor,
"Commanding the Forces of the United States.
"God and Liberty!