While this war was raging in all its fury, Santa Anna arrived at an age to choose an occupation for life; and with the ardor of youth he entered the king's service as a Creole officer, a cadet in the _Fijo de Vera Cruz_. In this fratricidal war he soon distinguished himself by that activity in the performance of the duties of a subaltern which, in more mature years, distinguished him as a leader and a politician. He was at that time in the unhappy dilemma of every man born in Spanish America; he was compelled to choose between two evils--either to join the king's cause, and fight for the Spaniards who oppressed his country, or to run the hazard of seeing re-enacted in Mexico the bloody tragedy of San Domingo, if the colored races should conquer in a contest with the Spaniards. A few Creoles had chosen the side of the insurgents; but they were few; as the Spanish cause could not have been sustained for a day, if it had not been for the want of confidence in the leaders of the insurrection. But it was not in contests with his own countrymen that Santa Anna first won distinction; it was in a battle with the filibustering invaders while yet Mexico was a colony of Spain: it was in the bloody battle of the river Madina, in Texas, where an army of three thousand men (according to Mexican accounts), on their way to join the Mexican insurgents, were totally routed by Aridondo. The zeal which Santa Anna continually exhibited in almost daily contests with guerillas outside of the walls of Vera Cruz, so long as the contest was confined to a war of races, soon won him distinction. But now he is called to play the part of a military politician; for when the news arrived in Mexico of the new constitutional revolution of 1820 in Spain itself, all the higher classes of society in the vice-kingdom were in terror. Ten years of bloodshed and civil disorder had been the fruits to Mexico of the first revolution of Spain--an insurrection that had not been effectually put down until Spain herself had returned to despotism, and now the newly-restored peace was threatened with a more bloody insurrection than the former, unless there was an entire separation of the two countries. Experience had fully demonstrated that the Spanish colonial system was compatible only with Spanish despotism. All native-born races desired to be free from the political disorders consequent upon the military revolutions of Spain herself. In this desire they were joined by that class who then ruled over the consciences of all men in Mexico, the clergy; for that powerful body preferred to sacrifice the allegiance they owed to the king, from whom they had received their preferments, rather than run the risk of losing their privileges. THE PLAN OF IGUALA.