Life of Franklin Pierce by Nathaniel Hawthorne

When Franklin Pierce declined the honorable offer of the attorney-generalship of the United States, he intimated that there might be one contingency in which he would feel it his duty to give up the cherished purpose of spending the remainder of his life in a private station. That exceptional case was brought about, in 1847, by the Mexican War. He showed his readiness to redeem the pledge by enrolling himself as the earliest volunteer of a company raised in Concord, and went through the regular drill, with his fellow-soldiers, as a private in the ranks. On the passage of the bill for the increase of the army, he received the appointment of colonel of the Ninth Regiment, which was the quota of New England towards the ten that were to be raised. And shortly afterwards, -- in March, 1847, -- he was commissioned as brigadier-general in the army; his brigade consisting of regiments from the extreme north, the extreme west, and the extreme south of the Union.

There is nothing in any other country similar to what we see in our own, when the blast of the trumpet at once converts men of peaceful pursuits into warriors. Every war in which America has been engaged has done this; the valor that wins our battles is not the trained hardihood of veterans, but a native and spontaneous fire; and there is surely a chivalrous beauty in the devotion of the citizen soldier to his country's cause, which the man who makes arms his profession, and is but doing his regular business on the field of battle, cannot pretend to rival. Taking the Mexican War as a specimen, this peculiar composition of an American army, as well in respect to its officers as its private soldiers, seems to create a spirit of romantic adventure which more than supplies the place of disciplined courage.