The Mexican Empire, specifically during its first existence from 1821 to 1823, was a short-lived monarchy that included not only modern-day Mexico but also several other territories.
Initially, the empire comprised the territory of present-day Mexico and was briefly expanded to include parts of Central America. The countries that were considered part of this empire at that time included:
- Mexico: The core of the empire.
- Guatemala: A significant portion of Central America included in the empire.
- Belize: This area was also contested and briefly associated with the empire.
- El Salvador: Included as part of the region.
- Honduras: Another Central American country that was included.
- Nicaragua: Also part of the territories claimed by the empire.
- Cost Rica: It was also under the brief influence or control of the empire.
Thus, while the Mexican Empire primarily focused on what is now Mexico, it had territorial claims and governance over several Central American nations during its short existence. It reflected the aspirations of early 19th-century Mexican leaders to expand their influence and create a larger political entity in the region.