The choice of this soldier was unfortunate. Personally ambitious and cherishing in secret the thought of independence, Iturbide, faithless to his trust, entered into negotiations with the insurgents which culminated February 24, 1821, in what was called the "Plan of Iguala." It contained three main provisions, or "guarantees," as they were termed: the maintenance of the Catholic religion to the exclusion of all others; the establishment of a constitutional monarchy separate from Spain and ruled by Ferdinand himself, or, if he declined the honor, by some other European prince; and the union of Mexicans and Spaniards without distinction of caste or privilege. A temporary government also, in the form of a junta presided over by the viceroy, was to be created; and provision was made for the organization of an "Army of the Three Guarantees." Despite opposition from the royalists, the plan won increasing favor. Powerless to thwart it and inclined besides to a policy of conciliation, the new viceroy, Juan O'Donoju, agreed to ratify it on condition--in obedience to a suggestion from Iturbide--that the parties concerned should be at liberty, if they desired, to choose any one as emperor, whether he were of a reigning family or not. Thereupon, on the 28th of September, the provisional government installed at the city of Mexico announced the consummation of an "enterprise rendered eternally memorable, which a genius beyond all admiration and eulogy, love and glory of his country, began at Iguala, prosecuted and carried into effect, overcoming obstacles almost insuparable"--and declared the independence of a "Mexican Empire." The act was followed by the appointment of a regency to govern until the accession of Ferdinand VII, or some other personage, to the imperial throne. Of this body Iturbide assumed the presidency, which carried with it the powers of commander in chief and a salary of 120,000 pesos, paid from the day on which the Plan of Iguala was signed. O'Donoju contented himself with membership on the board and a salary of one-twelfth that amount, until his speedy demise removed from the scene the last of the Spanish viceroys in North America. One step more was needed. Learning that the Cortes in Spain had rejected the entire scheme, Iturbide allowed his soldiers to acclaim him emperor, and an unwilling Congress saw itself obliged to ratify the choice. On July 21, 1822, the destinies of the country were committed to the charge of Agustin the First.