
Aztec empire on before Spanish Invasion
Hernán Cortés‘s conquest of the Aztec Empire is one of the most pivotal events in world history. It marked the fall of a mighty civilization and the establishment of Spanish dominance in Mesoamerica. This monumental clash was shaped by a combination of indigenous politics, Spanish technology, disease, and sheer human ambition.
The Aztec Empire Before Cortés
The Aztec Empire, at its height in the early 16th century, was a sophisticated and centralized society centered around Tenochtitlán (modern-day Mexico City). The Aztecs, or Mexica, dominated a vast area of central Mexico, ruling through a system of tributary city-states. Their emperor, Moctezuma II (also spelled Montezuma), held divine authority and led a highly militarized society that engaged in ritualistic warfare and human sacrifice to appease their gods, particularly Huitzilopochtli, the sun god.
Despite their power, the empire faced internal strains. Tributary states often resented Aztec rule due to heavy taxation and the demand for captives to sacrifice. This discontent would later play a critical role in Cortés’s success.
Hernán Cortés and the Spanish Expedition
Hernán Cortés, born in 1485 in Spain, was a conquistador seeking wealth and glory in the New World. By 1519, he had risen through the ranks of Spanish explorers in the Caribbean and gained command of an expedition to Mexico, despite orders from the Cuban governor, Diego Velázquez, to halt his plans.
Cortés set sail with about 600 men, 16 horses, and a few cannons. His small force reflected Spain’s reliance on strategy, alliances, and technology rather than sheer numbers. Crucially, the Spanish brought steel weapons, firearms, and cavalry, which were alien and terrifying to the indigenous peoples.
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Arrival in Mexico
Cortés landed on the Yucatán Peninsula in 1519, encountering the Maya. He defeated a local Maya force and gained interpreters, including a Spanish castaway named Jerónimo de Aguilar and a Nahua woman known as Malintzin (later called Doña Marina or La Malinche). Malintzin, fluent in both Nahuatl (the Aztec language) and Maya, became indispensable as a translator, advisor, and mediator.
Hernán Cortés was a Spanish conquistador who led an expedition from Cuba to mainland Mexico in 1519 CE. He sought wealth, glory, and the expansion of Spanish influence.
The Spanish moved northward, founding the settlement of Veracruz, which gave Cortés a base of operations and a degree of autonomy from Velázquez. To solidify his commitment, Cortés scuttled his ships, ensuring his men could not retreat.
The March to Tenochtitlán
Cortés advanced inland, encountering various indigenous groups. Some, like the Tlaxcalans, fiercely resisted, while others, like the Totonacs, sought alliances to escape Aztec domination. The Tlaxcalans, though initially hostile, became critical allies after their defeat. Their warriors bolstered Cortés’s forces and provided essential local knowledge.
On the way to Tenochtitlán, Cortés encountered emissaries from Moctezuma. The emperor, aware of the Spanish arrival, sent gifts of gold and sought to dissuade them from continuing. However, these gifts only fueled Spanish greed.
Entry into Tenochtitlán
In November 1519, Cortés and his forces entered Tenochtitlán. The city, built on an island in Lake Texcoco, astonished the Spanish with its size, architecture, and advanced infrastructure. Moctezuma received the Spaniards cordially, offering them quarters and treating them as honored guests. Historians debate Moctezuma’s motives—whether he viewed Cortés as a potential ally, a threat, or the embodiment of the god Quetzalcoatl, whose return some Aztec legends foretold.
Tensions and the Capture of Moctezuma
Despite the initial hospitality, tensions quickly escalated. The Spanish, wary of Aztec power, took Moctezuma hostage, using him as a puppet to control the empire. The Aztec nobility and populace grew increasingly hostile toward the Spanish presence, culminating in sporadic skirmishes.
The situation deteriorated further in 1520 when Cortés left Tenochtitlán to confront a Spanish force sent by Velázquez to arrest him. Cortés defeated this force and convinced many of its soldiers to join him.
The Massacre at the Main Temple
While Cortés was away, his lieutenant, Pedro de Alvarado, ordered a massacre during an Aztec religious festival, killing many nobles and priests. This act enraged the Aztecs, triggering a full-scale rebellion. When Cortés returned, he found Tenochtitlán in chaos.
The Spanish attempted to control the situation by using Moctezuma to pacify the crowd. However, he was met with scorn and possibly killed—accounts differ as to whether he was murdered by the Spanish or stoned by his own people.
La Noche Triste (The Night of Sorrows)
Facing overwhelming resistance, Cortés decided to retreat. On the night of June 30, 1520, the Spanish and their allies tried to flee the city under cover of darkness. They were discovered, and a fierce battle ensued on the causeways. Many Spaniards and Tlaxcalans were killed or captured, with the latter often sacrificed. Cortés himself narrowly escaped, weeping under a tree in what became known as La Noche Triste.
The Siege of Tenochtitlán
After regrouping in Tlaxcala, Cortés prepared for a counteroffensive. He built alliances with more indigenous groups disillusioned with Aztec rule, significantly increasing his forces. He also constructed brigantines (small warships) to gain control of Lake Texcoco.
In 1521, Cortés launched a siege of Tenochtitlán. The Spanish and their allies systematically cut off the city’s supply lines, destroyed its aqueducts, and used their superior weaponry to gain the upper hand. Starvation, disease (particularly smallpox, introduced by the Spanish), and relentless attacks devastated the population.
The Fall of the Aztec Empire
After months of fighting, Tenochtitlán fell on August 13, 1521. The last Aztec emperor, Cuauhtémoc, was captured, marking the end of the empire. The once-magnificent city was left in ruins, and its surviving inhabitants were enslaved or killed.
Factors Behind the Spanish Victory
Cortés’s alliances were crucial. The Spanish were vastly outnumbered and relied heavily on indigenous warriors, particularly the Tlaxcalans, who sought revenge against the Aztecs.
Spanish steel weapons, firearms, and cavalry gave them a tactical edge. The Aztecs, though skilled warriors, were unprepared for these tools of war.
Smallpox, introduced by the Spanish, decimated the Aztec population, including key leaders and warriors. The epidemic undermined the empire’s ability to resist effectively.
The Aztec system of rule bred resentment among tributary states, which Cortés exploited. Many indigenous groups saw the Spanish as liberators, at least initially.
The Spanish exploited Aztec beliefs and customs, creating confusion and fear. Their arrival coincided with omens that some interpreted as the return of Quetzalcoatl, which may have influenced Moctezuma’s actions.
Aftermath and Legacy
Following the conquest, Spain established the colony of New Spain, with Mexico City built atop the ruins of Tenochtitlán. The region became a vital part of the Spanish Empire.
The Spanish imposed Christianity, dismantled indigenous temples, and suppressed native traditions. However, indigenous cultures persisted and influenced colonial society.
The fall of the Aztec Empire marked the beginning of European dominance in the Americas. It set a precedent for future conquests and colonization, altering the course of history.
Historians continue to debate Cortés’s actions, Moctezuma’s role, and the ethics of conquest. While some view Cortés as a brilliant strategist, others see him as a symbol of European exploitation.

Frequently asked questions
What was the Aztec Empire, and when did it thrive?
The Aztec Empire thrived between c. 1345 and 1521 CE, becoming a dominant force in ancient Mesoamerica. It was a young and warlike civilization that rapidly expanded its influence and amassed extraordinary wealth.
What factors led to the rapid fall of the Aztec Empire?
The arrival of Spanish conquistadors led by Hernán Cortés, armed with firearms and driven by a relentless pursuit of treasure, coupled with alliances with discontented local groups, dismantled the Aztec Empire within three years.
What event marked the rise of the Aztec Empire?
The rise of the Aztec Empire began with the 1428 CE Tepanec War, where an alliance between Texcoco, Tenochtitlán, and Tlacopan defeated Azcapotzalco, forming the Triple Alliance, which initiated territorial expansion.
How did the Aztec Empire maintain its power?
The Aztec Empire maintained power through a system of tribute enforced by a formidable military. Conscripted soldiers, elite warriors, and tributes of goods, labor, and sacrificial captives supported Tenochtitlán’s dominance.
What weaknesses made the Aztec Empire vulnerable?
The empire’s reliance on fear, tribute, and military dominance, rather than integration, left it vulnerable to internal dissent. Key rival states like Tlaxcala and the Tarascan civilization also resisted Aztec expansion.
What were the ominous signs of the Aztec Empire’s downfall?
In 1515 CE, the Aztecs suffered a major defeat to Tlaxcala and Huexotzingo. Additionally, sightings of mysterious “floating temples” off the coast and other omens fueled anxieties of an impending crisis.
Who was Malintzin, and why was she significant?
Malintzin, also known as La Malinche, was a Nahua woman who became Cortés’ interpreter and advisor. Her knowledge of indigenous languages allowed Cortés to communicate with local groups and forge crucial alliances.
How did Cortés gain indigenous allies against the Aztecs?
Cortés encountered many tributaries of the Aztecs who resented their overlords. The Tlaxcalans, longtime enemies of the Aztecs, joined Cortés, significantly bolstering his forces.
What was the significance of Tenochtitlán?
Tenochtitlán, the Aztec capital, was the largest city in the Pre-Columbian Americas, with over 200,000 inhabitants. It was a hub of trade, wealth, and cultural splendor.
How did Cortés gain control over Moctezuma?
Cortés audaciously seized Moctezuma, using him as a puppet to control the empire. However, this strategy ultimately backfired, as tensions escalated into rebellion.
What was the Noche Triste?
The Noche Triste, or Night of Sorrows, occurred in June 1520 when Cortés and his men fled Tenochtitlán in a chaotic retreat. They suffered heavy losses during this escape.
What strategy did Cortés use to conquer Tenochtitlán?
Cortés regrouped in Tlaxcala and returned to besiege Tenochtitlán in 1521. He used warships to block supply routes, indigenous allies to bolster his forces, and smallpox weakened the Aztec population.
After 93 days of fighting, Tenochtitlán fell on August 13, 1521. The city was reduced to ruins, and Emperor Cuauhtémoc was captured, marking the end of the Aztec Empire.

The Capture of Cuauhtemoc
What was the aftermath of the Spanish conquest?
The Spanish established Mexico City on Tenochtitlán’s ruins, replacing indigenous traditions with Christianity and European governance. Smallpox and forced labor decimated the native population, leaving a legacy of cultural loss and colonial domination.