s of infantry and a
section of artillery. There was one regiment encamped by the side of
mine. I assumed command of the whole and the first night sent the
commander of the other regiment the parole and countersign. Not wishing
to be outdone in courtesy, he immediately sent me the countersign for
his regiment for the night. When he was informed that the countersign
sent to him was for use with his regiment as well as mine, it was
difficult to make him understand that this was not an unwarranted
interference of one colonel over another. No doubt he attributed it for
the time to the presumption of a graduate of West Point over a volunteer
pure and simple. But the question was soon settled and we had no
further trouble.

My arrival in Mexico had been preceded by that of two or three regiments
in which proper discipline had not been maintained, and the men had been
in the habit of visiting houses without invitation and helping
themselves to food and drink, or demanding them from the occupants.
They carried their muskets while out of camp and made every man they
found take the oath of allegiance to the government. I at once
published orders prohibiting the soldiers from going into private houses
unless invited by the inhabitants, and from appropriating private
property to their own or to government uses. The people were no longer
molested or made afraid. I received the most marked courtesy from the
citizens of Mexico as long as I remained there.

Up to this time my regiment had not been carried in the school of the
soldier beyond the company drill, except that it had received some
training on the march from Springfield to the Illinois River. There was
now a good opportunity of exercising it in the battalion drill. While I
was at West Point the tactics used in the army had been Scott's and the
musket the flint lock. I had never looked at a copy of tactics from the
time of my graduation. My standing in that branch of studies had been
near the foot of the class. In the Mexican war in the summer of 1846, I
had been appointed regimental quartermaster and commissary and had not
been at a battalion drill since. The arms had been changed since then
and Hardee's tactics had been adopted. I got a copy of tactics and
studied one lesson, intending to confine the exercise of the first day
to the commands I had thus learned. By pursuing this course from day to
day I thought I would soon get through the volume.

We were