World-changing1519 – 1521 · 2 years
Spanish Conquest of the Aztec Empire
Cortés' 600 men, indigenous allies, and smallpox toppled the Aztec Empire—killing millions through conquest and disease.
Estimated casualties
100K – 240Kestimated dead
HEADLINE240K — the single figure used on the map
combat and siege deaths 1519-1521 only; the 1520 smallpox epidemic (millions) is counted under spanish-conquest-mexico
SOURCEWikipedia: Spanish conquest of the Aztec Empire; Clodfelter
What happened
Hernán Cortés landed in Mexico (1519) seeking gold. The Aztec Empire under Montezuma II seemed invincible: 100,000-strong capital Tenochtitlan, millions of subjects, and sophisticated warfare. Cortés exploited indigenous resentment of Aztec tributary demands, recruited tens of thousands of Tlaxcalan and other allied warriors, and besieged Tenochtitlan (1520-1521). Smallpox decimated the population mid-siege. The Aztec surrendered; Cortés razed the city. Conquest killed soldiers and civilians through violence; smallpox killed millions in the following decades as European diseases swept Mesoamerica.
Why it mattered
Spanish conquest ended Aztec civilization and initiated 300 years of Spanish colonial rule in Mexico. Disease killed more indigenous people than the sword—90% population collapse across Mesoamerica. The conquest redistributed wealth to Spain, funding European Wars for 200 years. It marked the beginning of European global dominance and the end of indigenous American political autonomy. Mestizaje (mixing) and cultural hybridity emerged. Modern Mexico's identity is rooted in this collision.
Belligerents2
- Spanish Empire
- Aztec Empire
ON THE MAPSpanish Empire (Americas)Aztec Empire
Conflict graph
SUB-CONFLICTS · 2
- Battle of Cintla1519
- Battle of Otumba1520
Sources
- Clodfelter, Warfare and Armed Conflicts (4th ed., 2017)
- Wikipedia — text reused under CC BY-SA 4.0
Open in the atlas →Seeks the timeline to 1519 and opens this record.
Cite as: Spanish Conquest of the Aztec Empire (1519 – 1521). War Atlas. https://waratlas.org/c/spanish-conquest-aztec-empire · Sources & methodology