Provisional Government of Mexico in the context of "Agustin Iturbide"

From January 1822 to July 1823, the Captaincy General of Guatemala, a former Spanish colony, was controlled by the First Mexican Empire, and briefly, the Supreme Executive Power—the provisional government that succeeded Mexican imperial rule. The captaincy general consisted of the provinces of Chiapas, Costa Rica, El Salvador, Guatemala, Honduras, and Nicaragua—the six southernmost provinces of the Mexican Empire. The incorporation of Central America brought Mexico to the height of its territorial extent.

Only two months after the Act of Independence of Central America was signed in September 1821, Regent of Mexico Agustín de Iturbide, who later became the emperor of Mexico in May 1822, made a formal request to the Consultive Junta of Guatemala City—the Central American government—to accept annexation to the Mexican Empire. His request was accepted on 5 January 1822. Despite the acceptance by the Guatemalan-based government, El Salvador, Costa Rica, and parts of Nicaragua resisted Mexican annexation, and Mexican and allied Guatemalan soldiers were mobilized to subjugate those regions.