Mexican independence (1821)

Mexican independence (1821)
Name	Mexican independence (1821)
Date	1821
Location	New Spain
Result	Independence of Mexico; establishment of the First Mexican Empire
Combatants	Viceroyalty of New Spain; Spanish Empire vs. Army of the Three Guarantees; Insurgent Army (Mexico); Ultra-bourbonism?

Mexican independence (1821) The independence of Mexico in 1821 was the culmination of a decade-long conflict that transformed the political landscape of New Spain and reshaped relationships among Spain, criollo elites, indigenous communities, and foreign powers such as the United Kingdom and the United States. The final phase combined military action by the Trigarante Army with diplomatic negotiations involving figures linked to the Viceroyalty of New Spain, the Spanish Cortes of Cádiz, and conservative elites from New Spain's Audiencias and clerical institutions like the Catholic Church in Mexico. The result was the collapse of royal authority and the proclamation of the First Mexican Empire under Agustín de Iturbide after signatures at the Treaty of Córdoba.

Background

By the early 19th century, New Spain experienced tensions among peninsulares, criollos, mestizos, indigenous communities, and enslaved and freed Afro-descendants; these tensions intersected with global events such as the Napoleonic Wars, the abdications of Charles IV of Spain and Ferdinand VII at the Bayonne Abdications, and the liberal constitution of the Cortes of Cádiz (1812). Early insurgency was launched by clergy such as Miguel Hidalgo y Costilla and José María Morelos y Pavón who led campaigns across provinces including Guanajuato, Valladolid (Morelia), Puebla, and Veracruz. Royalist responses involved commanders like Félix María Calleja and institutions such as the Viceroyalty of New Spain and the Royalist Army (New Spain). The insurgent movement fragmented after the execution of leaders including Hidalgo, Ignacio Allende, and Morelos, while guerrilla activity persisted through figures like Vicente Guerrero and regional actors in Chiapas, Oaxaca, and Guerrero (state). International influences included the United Kingdom of Great Britain and Ireland's trade interests, the United States's expansionist posture, and émigré Spaniards allied with liberal factions in the Spanish Cortes.

Plan of Iguala and the Trigarante Army

In February 1821, conservative royalist-turned-royalist-ally Agustín de Iturbide and insurgent leader Vicente Guerrero promulgated the Plan of Iguala (Plan de Iguala) in Iguala, Guerrero, articulating the "Three Guarantees" of religion, independence, and unity and proposing a constitutional monarchy. The plan sought reconciliation among elites in Mexico City, rural criollo landholders in regions like Puebla and Jalisco, and military units from Acapulco to San Luis Potosí. Iturbide formed the Army of the Three Guarantees (Trigarante Army), which incorporated former royalists, former insurgents, and provincial militias such as units from Zacatecas and the Free and Sovereign State of Yucatán; this army marched on Mexico City demonstrating broad regional support and co-opting commanders including Guadalupe Victoria and local caudillos.

Political Negotiations and the Treaty of Córdoba

Political negotiations unfolded between representatives of the Spanish viceroyalty, imperial commissioners like Juan O'Donojú—the last viceroy with authority to negotiate—and Iturbide's government-in-formation. The Treaty of Córdoba ratified terms similar to the Plan of Iguala, recognizing Mexican independence under a proposed constitutional monarchy and outlining succession and religious provisions. While Spanish liberal and absolutist factions in the Cortes and in Madrid repudiated some provisions, the treaty functioned as de facto transfer of sovereignty. Diplomacy also involved other actors such as merchants in Cadiz, clergy in the Archdiocese of Mexico, and foreign representatives from the United Kingdom and the United States of America monitoring post-colonial alignments.

Social and Economic Impacts

Independence transformed social hierarchies across regions like Central Mexico, Baja California, and the Yucatán Peninsula by altering privileges of peninsulares and criollos, impacting land tenure systems including haciendas and indigenous community holdings such as ejidos. The conflict and ensuing policies affected silver mining centers in Zacatecas and Guanajuato, disrupted trade through ports like Veracruz and Cádiz, and invited commercial realignments with the United Kingdom and United States. Religious institutions including the Catholic Church in Mexico retained significant influence while legal shifts addressed titles and obligations under laws modeled on earlier codes like provisions from the Cortes of Cádiz (1812). Social consequences included shifts in labor regimes affecting Afro-Mexican populations in Veracruz (state) and indigenous uprisings in regions such as Chiapas and Oaxaca, while economic instability prompted debates among financiers, bankers in Mexico City, and landowners in Jalisco.

Role of Key Figures

Principal actors shaped military, political, and clerical dimensions: Agustín de Iturbide negotiated with royalists and organized the Trigarante Army; Vicente Guerrero maintained insurgent legitimacy; Juan O'Donojú negotiated the Treaty of Córdoba; early insurgent founders such as Miguel Hidalgo y Costilla and José María Morelos y Pavón provided ideological and military precedents; royalist commanders like Félix María Calleja and administrators from the Viceroyalty of New Spain resisted and then accommodated shifts; clerics like Ignacio Elizondo and institutions like the Archdiocese of Mexico influenced legitimacy; regional caudillos and gentry from Puebla, Zacatecas, Yucatán, Oaxaca, and Nuevo León played pivotal roles in local transitions. International figures and states such as George Canning-era British policy, merchants in Seville, and the United States Department of State's regional posture also affected outcomes.

Aftermath and Establishment of the First Mexican Empire

Following entry of the Trigarante Army into Mexico City, political bodies convened to determine a monarch; the proclamation of the First Mexican Empire named Agustín I of Mexico emperor. The new regime faced challenges from republicans advocating figures like Guadalupe Victoria and Nicolás Bravo, royalist loyalists, regional separatists in Yucatán and Central America—which soon separated to form the Federal Republic of Central America—and foreign concerns from the United Kingdom and Spain, which did not immediately recognize independence. Economic recovery required stabilization of silver production in Guanajuato and Zacatecas, resolution of ecclesiastical privileges, and reconciliation with indigenous communities under laws influenced by earlier decrees from the Cortes of Cádiz (1812). The empire was short-lived, leading within years to republican movements and further conflicts shaped by leaders who had participated in the independence era.

Category:History of Mexico