Ulysses S. Grant, then a young soldier in the army of the United States, took part in the Mexican war. He went into the battle of Palo Alto as second lieutenant, at the age of twenty-six, and entered the city of Mexico sixteen months later with the conquering army. In his personal memoirs General Grant expresses his opinion that the Mexican war was one of the most unjust ever waged by a stronger against a weaker nation. "It was an instance," he says, "of a republic following the bad example of European monarchies, in not considering justice in their desire to acquire additional territory." XXXV. BENITO JUAREZ. Peace was restored, and with it revived commerce and industry; the coffers of government were full, thanks to the fifteen millions of _pesos_ received from the United States to heal the wounds of war. General Herrera took possession of the presidential chair, and Mexico, after twenty years of warfare, civil and foreign, took a respite of as many months. Herrera became President on the 3d of June, 1848, and fulfilled the appointed time of office until January, 1851, when he handed over the control to his successor, when for the first time in the history of the Republic this change was effected without violence. His administration was economical and moral, and so was that of his successor, General Arista, who continued the reform of the army, bringing order into the financial condition of the country. These two terms may be regarded as models of good government. [Illustration: BENITO JUAREZ.] Before the close of Arista's term the Mexicans took up their old practice of _pronouncing_, and rather than create a disturbance, the President, finding himself unpopular, secretly retired from the capital. Resolutions began, and Santa Anna, hearing their echo afar, returned to the country once more, to be made Dictator. But Mexico was not to fall back into the hopeless anarchy of the period before the American war. The better class had learned to desire peace, and there were leaders among them strong enough to restrain the mobile desires of the multitude, and lead them to better things. The epoch of the reform began; and although this reform was signalized by bloodshed, it was a war for definite objects and principles, and not a squabble, setting up and putting down incompetent presidents, which used to prevail.