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.
Camino Real de Tierra Adentro
In 1821, after 11 years of struggle, Mexico gained its independence from Spain. The Camino Real maintained an important role in this period, since travelers brought communication about the events that were taking place in the center of the country to the towns and villages of the internal provinces. During the Mexican War of Independence, the Camino Real was used by both forces, rebels and royal forces. For example, after the liberator Miguel Hidalgo y Costilla launched the war of independence, he used the road to retreat from the Battle of the Bridge of Calderón fought on the banks of the Calderón River 60 km (37 mi) east of Guadalajara in present-day Zapotlanejo, Jalisco northward, eventually arriving at the Wells of Baján in Coahuila where he was captured and executed by royal forces.