had a different record to make upon the event of the Mexican War
's company of sappers and miners was attached to the second division of regulars, under command of General Twiggs
, which formed the advance of the army.
Soon after leaving Puebla
, they were joined by General Scott
, the commander-in-chief
Our troops entered the Valley of Mexico
on the 10th, and General Scott
fixed his Headquarters for the time at Ayotla, a village on the northeastern edge of the Lake of Chalco
, about nine miles east of the fortified position of El Peñon, which was carefully reconnoitred on the 12th and its great strength fully discovered.
On the next day, another reconnoissance was pushed upon the route by Mexicalcingo.
This was pronounced by General Scott
, the most daring reconnoissance of the whole war, as the small corps of observation was obliged to pass close by the strong position of El Peñon and to leave it for a considerable space in the rear.
In both of these reconnoissances Lieutenant McClellan
took part; and in one of them he was saved from probable death or captivity at the hands of about a dozen Mexican
lancers by Lieutenant Beauregard
and three dragoons.
When, in consequence of the great strength of the defences at El Peñon, the project of advancing upon Mexico
by the great road from Puebla
, and assaulting it upon the eastern side, was abandoned, and it was determined to march round the southern shore of Lake Chalco and attack the city on