The attempt of Louis Napoleon to establish a European monarchy in Mexico under the tutelage of France was the most serious menace that republican institutions in the new world have had to face since the schemes of the Holy Alliance were checked by Monroe and Canning. The thwarting of that attempt may be accounted one of the greatest triumphs of American diplomacy. The internal disorders common to South and Central American republics have always been a fruitful source of embarrassment to the United States, on account of the liability to European intervention to which these governments continually subject themselves in such periods by their open and flagrant disregard of international obligations. Of no country is this statement truer than of Mexico, where the well-nigh interminable strife of parties gave rise between the years 1821 and 1857 to thirty-six different governments. In 1857 a favorable change occurred in the affairs of the republic. A constituent congress, elected by the people of the different states, framed and adopted a republican constitution which promised better things for the future. Under the provisions of this constitution an election was held in July (1857) and General Comonfort chosen president almost without opposition. His term of office was to begin December 1, 1857, and to continue four years. Within one brief month, however, President Comonfort was driven from the capital, and ultimately from the country, by an uprising headed by General Zuloaga. As soon as Comonfort abandoned the presidency, General Benito Juarez, the president of the Supreme Court of Justice, became according to the constitution, the president _de jure_ of the republic for the remainder of the unexpired term, that is, until December 1, 1861. General Zuloaga had, however, assumed the name of president, with indefinite powers, and the entire diplomatic corps, including the minister of the United States, had recognized his government. But Zuloaga was speedily expelled, and the supreme power seized by General Miramon, the head of the church party, whom the diplomatic corps likewise recognized. Meanwhile Juarez, the constitutional president, had proceeded to Vera Cruz, where he put his administration into successful operation.