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🇲🇽History of Aztec Mexico and New Spain

Significant Aztec Battles

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Why This Matters

These battles aren't just a timeline of violence—they reveal the fundamental power structures, alliance systems, and military strategies that defined both the Aztec Empire and its eventual conquest. You're being tested on how indigenous rivalries, tributary systems, and Spanish-indigenous alliances shaped the outcome of the conquest. Understanding why the Tlaxcalans allied with Cortés matters far more than memorizing the date of any single battle.

Don't just memorize who won each fight. Know what each battle demonstrates about Aztec political organization, Spanish military advantages, and the role of indigenous allies in the conquest. The exam will ask you to analyze causation and consequence—how one conflict created conditions for the next, and how pre-existing tensions within Mesoamerica made Spanish victory possible.


Empire Building: The Rise of Mexica Power

The Aztec Empire didn't exist before 1428. These early battles show how the Mexica transformed from subordinate tribute-payers into the dominant force in central Mexico through strategic alliance-building and military expansion.

Battle of Azcapotzalco (1428)

  • Founding moment of the Triple Alliance—the Mexica joined with Texcoco and Tlacopan to overthrow their former overlords, the Tepanecs
  • Ended Tepanec hegemony in the Valley of Mexico, redistributing power to the three allied city-states
  • Established the tributary system that would define Aztec imperial expansion for the next century

First Contact: Spanish Arrival and Indigenous Response

The earliest encounters between Spanish forces and Mesoamerican peoples established patterns that would repeat throughout the conquest—initial resistance followed by strategic alliance-making.

Battle of Centla (1519)

  • First major land battle between Spanish forces and indigenous groups on the Gulf Coast near present-day Tabasco
  • Spanish cavalry proved decisive—horses, unknown in the Americas, created psychological and tactical advantages
  • Resulted in tribute and intelligence, including enslaved people (among them, Malintzin/La Malinche) who became crucial interpreters

Battle of Tlaxcala (1519)

  • Tlaxcalans initially fought fiercely against the Spanish, inflicting significant casualties over several weeks of combat
  • Strategic reversal—Tlaxcalan leaders chose alliance over continued resistance, recognizing an opportunity against their Aztec enemies
  • Most consequential alliance of the conquest—Tlaxcalan warriors would provide the majority of fighting forces against Tenochtitlan

Compare: Battle of Centla vs. Battle of Tlaxcala—both involved initial indigenous resistance, but Tlaxcala's decision to ally with Spain (rather than simply submit) transformed the conquest from a Spanish expedition into an indigenous civil war with Spanish leadership. If an FRQ asks about the role of indigenous peoples in the conquest, Tlaxcala is your essential example.


Terror as Strategy: Spanish Massacres

The Spanish deliberately used mass violence against civilians to intimidate other communities into submission. These weren't battles in the traditional sense—they were calculated demonstrations of brutality.

Fall of Cholula (1519)

  • Surprise massacre of Cholula's nobility during what was presented as a peaceful meeting—estimates suggest 3,000-6,000 killed
  • Justified by alleged conspiracy—Cortés claimed (with Malintzin's intelligence) that Cholulans planned an ambush, though this remains disputed
  • Psychological warfare succeeded—news of the massacre spread rapidly, causing other cities to submit without resistance

Toxcatl Massacre (1520)

  • Attack during a religious festival when Aztec nobles were unarmed and celebrating the feast of Toxcatl
  • Pedro de Alvarado ordered the assault while Cortés was away, killing hundreds of the Aztec elite
  • Backfired catastrophically—rather than intimidating the Aztecs, it triggered the uprising that drove the Spanish from Tenochtitlan

Compare: Fall of Cholula vs. Toxcatl Massacre—both used surprise violence against unarmed populations, but with opposite results. Cholula terrorized others into submission; Toxcatl united the Aztecs in resistance. This contrast illustrates how context and target determined whether terror tactics succeeded or failed.


Aztec Resistance and Spanish Vulnerability

These battles demonstrate that Spanish victory was never inevitable. The Aztecs inflicted devastating losses and nearly destroyed the expedition entirely, revealing the limits of Spanish military technology against determined indigenous resistance.

La Noche Triste (1520)

  • Catastrophic Spanish retreat from Tenochtitlan on June 30-July 1, 1520, following the Toxcatl Massacre's aftermath
  • Massive casualties—Spanish lost perhaps 600 soldiers, thousands of Tlaxcalan allies, and most of their accumulated treasure
  • Aztec tactical success using canoe-based attacks on causeways, exploiting the geography of the lake-bound city

Battle of Otumba (1520)

  • Desperate Spanish survival just days after La Noche Triste, when Aztec forces pursued the retreating army
  • Turning point came when Spanish killed the Aztec commander—capturing his battle standard caused Aztec forces to withdraw
  • Demonstrated Spanish resilience but also their dependence on indigenous allies who absorbed most casualties

Compare: La Noche Triste vs. Battle of Otumba—these back-to-back engagements show the conquest's razor-thin margins. The same Spanish force that suffered humiliating defeat achieved victory days later through leadership decapitation tactics. Both battles reveal that outcomes depended as much on contingency as on technological advantage.


The Final Campaign: Siege Warfare and Imperial Collapse

After regrouping with Tlaxcalan allies, the Spanish launched a systematic campaign to isolate and destroy Tenochtitlan. These battles show how indigenous alliance networks and European siege tactics combined to overcome Aztec resistance.

Conquest of Tepeaca (1520)

  • Punitive campaign against a city that had killed Spanish soldiers during the retreat from Tenochtitlan
  • Established a Spanish base (renamed Segura de la Frontera) for regrouping and planning the final assault
  • Introduced formal enslavement—captives were branded and distributed, setting precedents for colonial labor extraction

Battle of Tehuacán (1520)

  • Part of the consolidation campaign as Spanish forces secured the region between Tlaxcala and the Gulf Coast
  • Demonstrated persistent indigenous resistance—not all communities accepted Spanish-Tlaxcalan dominance
  • Secured supply lines essential for the planned siege of Tenochtitlan

Siege of Tenochtitlan (1521)

  • 75-day siege combining naval blockade (using specially constructed brigantines), starvation tactics, and systematic destruction
  • Indigenous allies provided overwhelming numbers—estimates suggest 200,000+ allied warriors versus Spanish forces numbering in the hundreds
  • Ended August 13, 1521 with the capture of Cuauhtémoc, the last Aztec tlatoani, marking the formal end of the Aztec Empire

Compare: Battle of Azcapotzalco (1428) vs. Siege of Tenochtitlan (1521)—bookend battles that created and destroyed Aztec imperial power. Both succeeded through coalition warfare, demonstrating that Mesoamerican politics always centered on alliance systems rather than single-power dominance. The Spanish didn't defeat the Aztecs alone—they inherited and exploited existing rivalries.


Quick Reference Table

ConceptBest Examples
Alliance formation and indigenous agencyBattle of Tlaxcala, Battle of Azcapotzalco
Spanish terror tacticsFall of Cholula, Toxcatl Massacre
Aztec military effectivenessLa Noche Triste, Battle of Otumba
Role of indigenous allies in conquestSiege of Tenochtitlan, Conquest of Tepeaca
Spanish technological advantagesBattle of Centla, Battle of Otumba
Siege warfare and systematic conquestSiege of Tenochtitlan, Conquest of Tepeaca
Pre-conquest Aztec expansionBattle of Azcapotzalco
Unintended consequences of violenceToxcatl Massacre

Self-Check Questions

  1. Which two battles best demonstrate that the Spanish conquest depended more on indigenous alliances than on European military technology? What specific evidence supports this?

  2. Compare the outcomes of the Fall of Cholula and the Toxcatl Massacre. Why did similar tactics produce opposite results?

  3. How does the Battle of Azcapotzalco (1428) help explain why the Tlaxcalans allied with the Spanish in 1519?

  4. If an FRQ asked you to evaluate the claim that "the Spanish conquered the Aztec Empire," which battles would you use to complicate or challenge that narrative?

  5. Identify three battles that demonstrate Aztec military capability and explain what each reveals about the limits of Spanish power during the conquest.