If Mexico had won the Mexican-American War instead of the United States, it would have likely meant that Mexico retained control over its territories and prevented their annexation by America.
Related terms
Border Disputes: Conflicts or disagreements between neighboring countries over shared borders or territorial boundaries.
Nationalism: Strong loyalty and devotion to one's own nation or country.
Territorial Integrity: The principle that states should not be subjected to any external interference or aggression aimed at taking away their land or altering their boundaries.