find, or to make, a road by which the rear of the enemy's works might be
reached without a front attack. These reconnoissances were made under
the supervision of Captain Robert E. Lee, assisted by Lieutenants P. G.
T. Beauregard, Isaac I. Stevens, Z. B. Tower, G. W. Smith, George B.
McClellan, and J. G. Foster, of the corps of engineers, all officers who
attained rank and fame, on one side or the other, in the great conflict
for the preservation of the unity of the nation. The reconnoissance was
completed, and the labor of cutting out and making roads by the flank of
the enemy was effected by the 17th of the month. This was accomplished
without the knowledge of Santa Anna or his army, and over ground where
he supposed it impossible. On the same day General Scott issued his
order for the attack on the 18th.

The attack was made as ordered, and perhaps there was not a battle of
the Mexican war, or of any other, where orders issued before an
engagement were nearer being a correct report of what afterwards took
place. Under the supervision of the engineers, roadways had been opened
over chasms to the right where the walls were so steep that men could
barely climb them. Animals could not. These had been opened under
cover of night, without attracting the notice of the enemy. The
engineers, who had directed the opening, led the way and the troops
followed. Artillery was let down the steep slopes by hand, the men
engaged attaching a strong rope to the rear axle and letting the guns
down, a piece at a time, while the men at the ropes kept their ground on
top, paying out gradually, while a few at the front directed the course
of the piece. In like manner the guns were drawn by hand up the
opposite slopes. In this way Scott's troops reached their assigned
position in rear of most of the intrenchments of the enemy, unobserved.
The attack was made, the Mexican reserves behind the works beat a hasty
retreat, and those occupying them surrendered. On the left General
Pillow's command made a formidable demonstration, which doubtless held a
part of the enemy in his front and contributed to the victory. I am not
pretending to give full details of all the battles fought, but of the
portion that I saw. There were troops engaged on both sides at other
points in which both sustained losses; but the battle was won as here
narrated.

The surprise of the enemy was complete, the victory overwhelming; some
three thousand prisoners fe