At the height of the First Mexican Empire, Mexico's borders extended far beyond their current placement. What is the southernmost modern-day nation that would have been within the First Mexican Empire's borders in 1821?

At the height of the First Mexican Empire's territorial expansion in 1821, its territories expanded south to include Costa Rica, stopping near the border of modern-day Panama. Just two years later, many central American countries left Mexico during its transitional period between empire and republic.

Asked by Jason Forbes · Last updated 5 years ago · 497 views · SOURCE