Hooker's career in Mexico was not remembered when the rebellion began, or he would have earlier stood high in the confidence of the government, for it was among the most brilliant of the many successes attained by the many very able young men engaged in that war. To have risen under the old and very faulty organization of the army in a short war, in which there were few casualties, from a lieutenant to be brevetted lieutenant colonel of the regular army, was no small achievement. Hooker was successively brevetted captain, major, and lieutenant colonel "for gallant and meritorious conduct" in the several conflicts at Monterey, in the affair at the National Bridge, and in the assault of Chapultepec. He was detailed, if I remember rightly, early in the campaign as adjutant general on the staff of General Gideon Pillow, and, though Gabriel Rains and Ripley were associated with him on duty, it was generally understood and felt that the young chief of staff furnished all the brains and most of the energy and industry to be found at the head-quarters of the division. Pillow, Rains, and Ripley became somewhat notorious during the late rebellion as officers of the rebel army. During the war with Mexico sectional feeling ran high on the subject of supporting the administration in the prosecution of an offensive war, and very often young Hooker was compelled to hear tirades uttered by these Southern officers against his native state, which gave only a lukewarm support to the war of invasion which that against Mexico was deemed, but he never allowed them to pass unreproved or unresented. A less positive character than Hooker might have been influenced in his state allegiance by such surroundings in a camp composed almost exclusively of Southern soldiers, and at a head-quarters where prevailed the most intensely bitter sectionalism which then disgraced the army. The discussions which grew out of the objections which the young chief of staff took to the peculiar views of the embryo rebels only served to confirm him in his adherence to and love of the government; and none of the old army officers entered into the war for the Union with more alacrity or with a clearer conception of the desperate purposes and characters of the traitors than did Joe Hooker.