persevered in, and her avowed purpose in commencing a war with the
United States was to reconquer Texas and to restore Mexican authority
over the whole territory--not to the Nueces only, but to the Sabine. In
view of the proclaimed menaces of Mexico to this effect, I deemed it my
duty, as a measure of precaution and defense, to order our Army to
occupy a position on our frontier as a military post, from which our
troops could best resist and repel any attempted invasion which Mexico
might make. Our Army had occupied a position at Corpus Christi, west of
the Nueces, as early as August, 1845, without complaint from any
quarter. Had the Nueces been regarded as the true western boundary of
Texas, that boundary had been passed by our Army many months before it
advanced to the eastern bank of the Rio Grande. In my annual message of
December last I informed Congress that upon the invitation of both the
Congress and convention of Texas I had deemed it proper to order a
strong squadron to the coasts of Mexico and to concentrate an efficient
military force on the western frontier of Texas to protect and defend
the inhabitants against the menaced invasion of Mexico. In that message
I informed Congress that the moment the terms of annexation offered by
the United States were accepted by Texas the latter became so far a part
of our own country as to make it our duty to afford such protection and
defense, and that for that purpose our squadron had been ordered to the
Gulf and our Army to take a "position between the Nueces and the Del
Norte" or Rio Grande and to "repel any invasion of the Texan territory
which might be attempted by the Mexican forces."

It was deemed proper to issue this order, because soon after the
President of Texas, in April, 1845, had issued his proclamation
convening the Congress of that Republic for the purpose of submitting to
that body the terms of annexation proposed by the United States the
Government of Mexico made serious threats of invading the Texan
territory. These threats became more imposing as it became more apparent
in the progress of the question that the people of Texas would decide in
favor of accepting the terms of annexation, and finally they had assumed
such a formidable character as induced both the Congress and convention
of Texas to request that a military force should be sent by the United
States into her territory for the purpose of protecting and defending
her against the threatened i