Answer
independence from Espana
Explanation
Mexico was a colony of Spain and it was said to have produced major civilizations which are the  Olmec, Maya, Teotihuacan, Toltec, and Aztec.
After Napoleons occupation in Spain, it led to the outbreak of revolts all across the Spanish America.This was in 19th century Although Mexico gained its independence in September 1821 he marking of this historical event did not take hold immediately. The choice of date to celebrate was problematic, because Iturbide, who achieved independence from Spain, was rapidly created Emperor of Mexico.
