Mexican War of Independence
Iturbide's assignment to the Oaxaca expedition coincided with a successful military coup in Spain against the monarchy of Ferdinand VII. The coup leaders, part of an expeditionary force assembled to suppress the independence movements in the Americas, had turned against the monarchy. They compelled the reluctant Ferdinand to reinstate the liberal Spanish Constitution of 1812 that created a constitutional monarchy. When news of the liberal charter reached Mexico, Iturbide perceived it both as a threat to the status quo and a catalyst to rouse the criollos to gain control of Mexico. Independence was achieved when conservative Royalist forces in the colonies chose to rise up against the liberal regime in Spain; it was an about-face compared to their previous opposition to the peasant insurgency. After an initial clash with Guerrero's forces, Iturbide assumed command of the royal army. At Iguala, he allied his formerly royalist force with Guerrero’s radical insurgents to discuss the renewed struggle for independence.
Mexico–Venezuela relations
Both Mexico and Venezuela share a common history in the fact that both nations were once part of the Spanish Empire. During the Spanish colonial period, Mexico was then known as Viceroyalty of New Spain and the capital being Mexico City while Venezuela was governed from the Viceroyalty of New Granada in Bogotá. In 1810, both Mexico and Venezuela declared their independence from Spain with each nation obtaining independence in 1821 and 1830, respectively. Soon after obtaining independence, Emperor Agustín de Iturbide of Mexico contacted President Simón Bolívar by informing him of his ascension to the Mexican throne and telling him of his personal admiration for Bolívar after learning about his heroic valor and successful military campaigns.