Since a constituent assembly had declared itself in favor of establishing a federal form of republic patterned after that of the United States, the promulgation of a constitution followed on October 4, 1824, and Guadalupe Victoria, one of the leaders in the revolt against Iturbide, was chosen President of the United Mexican States. Though considerable unrest prevailed toward the close of his term, the new President managed to retain his office for the allotted four years. In most respects, however, the new order of things opened auspiciously. In November, 1825, the surrender of the fortress of San Juan de Ulua, in the harbor of Vera Cruz, banished the last remnant of Spanish power, and two years later the suppression of plots for the restoration of Ferdinand VII, coupled with the expulsion of a large number of Spaniards, helped to restore calm. There were those even who dared to hope that the federal system would operate as smoothly in Mexico as it had done in the United States. But the political organization of a country so different from its northern neighbor in population, traditions, and practices, could not rest merely on a basis of imitation, even more or less modified. The artificiality of the fabric became apparent enough as soon as ambitious individuals and groups of malcontents concerted measures to mold it into a likeness of reality. Two main political factions soon appeared. For the form they assumed British and American influences were responsible. Adopting a kind of Masonic organization, the Conservatives and Centralists called themselves Escoceses (Scottish-Rite Men), whereas the Radicals and Federalists took the name of Yorkinos (York-Rite Men). Whatever their respective slogans and professions of political faith, they were little more than personal followers of rival generals or politicians who yearned to occupy the presidential chair.