The Spanish Conquest of Mexico Timeline

The Spanish Conquest of Mexico 50

1485 – 1504 Hernán Cortés -- the man before Mexico Hernán Cortés de Monroy y Pizarro Altamirano (1485-1547) is born in Medellín, Extremadura, Spain -- the same poor, hardscrabble region that produces many of the conquistadors (Francisco Pizarro, Francisco de Orellana). He studies law at Salamanca for two years before leaving for the New World in 1504 at age 19, settling in Hispaniola and then Cuba under the colonial governor Diego Velázquez. His early Caribbean career is that of a successful but unremarkable colonial administrator -- he is a notary, a landowner, a participant in the conquest of Cuba (1511). In 1518 Velázquez appoints him to lead an expedition to Mexico; before the expedition departs, Velázquez revokes the appointment (fearing Cortés's ambition); Cortés sails anyway (February 1519) -- an act of direct insubordination that puts him in technical rebellion against Spanish authority from the moment he begins. This complicated legal status shapes his entire campaign: he must succeed spectacularly to justify his disobedience.
1519 – 1521 Bernal Díaz del Castillo -- the soldier who remembered Bernal Díaz del Castillo (1492-1584), a common soldier in Cortés's force, writes his Historia Verdadera de la Conquista de la Nueva España (True History of the Conquest of New Spain) in his old age -- completing it around 1568, almost 50 years after the events -- as a response to the official histories that give credit to Cortés alone and omit the contributions of ordinary soldiers. His account is the most vivid and humanly immediate description of the conquest that survives: he describes the first sight of Tenochtitlan as an enchanted vision from a novel; he describes the terror of the Noche Triste; he describes the smell of the fallen city. His memory is not infallible (dates are wrong; sequences are confused) but his powers of observation and description are extraordinary. He is the Herodotus of the conquest: a man who was there, who wants to be remembered, and who writes in a direct, unembellished style that makes the events immediate across five centuries.
1519 Cempoala and the Totonac alliance The Totonac city of Cempoala (population approximately 20,000-30,000 -- the largest city Cortés has seen) is the site of his first significant indigenous alliance. The Totonac chief (nicknamed "Fat Chief" by the Spanish because of his obesity) provides Cortés with 400 porters and the political rationale for advancing inland: the Totonac are subject to the Triple Alliance, resent the tribute demands and the seizure of victims for sacrifice, and are willing to support any force that threatens Tenochtitlan. Cortés does more than accept their alliance: he arrests five Aztec tribute collectors (calpixque) who appear in Cempoala -- an act of extraordinary audacity that simultaneously demonstrates his hostility to the Triple Alliance and his power over his new Totonac allies (who are terrified of the consequences of the arrest). He then secretly releases two of the collectors and sends them to Moctezuma with a message of friendship -- a diplomatic double game that begins the pattern of the entire campaign.
1519 – 1521 Cortés after Mexico -- the lonely victor Hernán Cortés's post-conquest career is one of the most anticlimactic in the history of successful conquerors. He is appointed Governor and Captain-General of New Spain (1522) but immediately faces political challenges: rivals in Spain (backed by Velázquez and his faction) undermine his authority; he is forced to make the disastrous Honduras expedition (1524-1526) to suppress a rebellion; during his absence, his enemies seize control of Mexico City and his personal assets. He spends years in Spain (1528-1530) at court, obtaining the title of Marqués del Valle de Oaxaca and the recognition of his conquests, but the political power to govern New Spain is given to others (a royal audiencia). His later years are spent on diminishing expeditions (Baja California, 1535-1536; a final return to Spain, 1540) and in litigation over his estates. He dies in Spain in 1547, aged 62 -- wealthy but politically marginalised. He asks to be buried in Mexico; his remains are moved several times before settling at the Hospital de Jesús Nazareno in Mexico City, where they remain in unmarked obscurity.
1519 – 1521 Cortés's letters to Charles V -- the first spin doctor The five Cartas de Relación (Letters of Relation) that Hernán Cortés writes to Charles V during the conquest (1519-1526) are the most important primary source for the Spanish perspective -- and simultaneously a masterpiece of self-serving narrative designed to justify an act of insubordination, solicit royal support, and prevent Velázquez's complaints from reaching the king before Cortés's version does. The letters are remarkable documents: detailed, intelligent, occasionally self-deprecating (to seem more credible), full of tactical analysis and political interpretation. They describe Tenochtitlan with genuine awe; they justify the Cholula massacre as necessary; they present the indigenous allies as loyal subjects of the Crown rather than sovereign peoples with their own interests; and they cast Cortés consistently as a loyal servant of Charles V doing what had to be done in impossible circumstances. The letters are largely successful: Charles V supports Cortés against Velázquez and eventually grants him the title of Marqués del Valle de Oaxaca.
1519 – 1521 Gold -- the obsession that drives everything Gold (teocuitlatl, "excrement of the gods" in Nahuatl -- the Aztec term captures both its divine origin and its superfluity) is Cortés's primary motivation and his greatest source of political difficulty. The Spanish expedition is financed on credit; the soldiers fight for a promised share of the loot; Cortés must send a share to Charles V (to justify the expedition legally); and all of this requires finding and extracting enormous quantities of gold. The gold in Moctezuma's treasury is real and spectacular -- Cortés sends a shipment to Charles V in 1519 (the "First Letter" treasure) that is intercepted by French pirates and never arrives; the gold described by Bernal Díaz in the treasury includes magnificent featherwork and goldsmithery that Dürer (who sees the treasure in Brussels) calls the most marvellous things he has ever seen. Most of this treasure is melted into ingots by the Spanish -- destroying irreplaceable artistic masterpieces. The gold lost on the Noche Triste has never been recovered. "We did not come here to till the soil like peasants," Cortés tells a priest who questions his methods, "but to win gold."
1519 – 1521 Horses in the conquest -- psychological weapons The 16 horses that Cortés lands in Mexico in 1519 are among the most psychologically significant weapons of the conquest -- not because they are technologically decisive (they are largely useless in the narrow streets of Tenochtitlan and on the causeways) but because the people of central Mexico have never seen a large domesticated animal ridden by a human. The initial reaction of the Mexica to the horse: the horse and rider appear to be a single being, a god-animal hybrid, something outside all previous experience. This impression fades quickly (within weeks of the first encounter the Mexica are training their warriors to target the horses specifically, knowing that a dead horse eliminates the rider's tactical advantage) but the initial shock is real and consequential. Horses are also effective in open terrain: the plains of Otumba, where Cortés's cavalry charges break the Aztec formation, demonstrate their tactical value outside urban environments. The 16 horses that land with Cortés in 1519 are the ancestors of the feral mustang populations of North America -- one of the most consequential introductions in ecological history.
1519 – 1521 Ixtlilxochitl -- the Texcocan defector Ixtlilxochitl (c.1500-1548), a prince of the Texcocan royal house, is the most important indigenous individual to join Cortés after the Tlaxcalans -- and the defector whose support gives the Spanish access to the lake's eastern shore. The son of Nezahualpilli (the last great tlatoani of Texcoco), Ixtlilxochitl is the losing candidate in the succession dispute that followed his father's death (1515) -- Moctezuma II had imposed his preferred candidate against the Texcocan council's wishes. When Cortés arrives, Ixtlilxochitl sees an opportunity to unseat Moctezuma's puppet and restore his own family's primacy. He provides Cortés with Texcocan territory as a base for the siege, Texcocan canoe fleets to support the brigantines, Texcocan workers to build the brigantines, and a significant Texcocan fighting force. In return, he is baptised as a Christian (taking the Spanish name Fernando) and becomes the ruler of Texcoco after the conquest. His great-grandson Fernando de Alva Ixtlilxochitl (c.1578-1650) is the most important colonial-era indigenous historian.
1519 La Malinche -- the woman who makes the conquest possible La Malinche (Nahuatl name: Malintzin or Malinalli; baptised Marina; c.1500-1529) is arguably the most important single individual in the Spanish conquest -- the Nahuatl-speaking woman of noble origin who serves as Cortés's translator, cultural interpreter, diplomatic agent and ultimately his consort, without whom the linguistic and cultural barrier between the Spanish and the Nahuatl-speaking world would have been insuperable. Born to a noble family in the Nahuatl-speaking region of Tabasco or Coatzacoalcos, she is sold into slavery by her mother (after her father's death, to allow her half-brother to inherit), passed to the Maya and eventually given to Cortés as tribute after the Battle of Tabasco (1519). Her linguistic ability (Nahuatl, Maya and subsequently Spanish), her intelligence and her cultural knowledge make her indispensable. Her moral status in Mexican historiography is deeply contested: simultaneously the traitor who enables the conquest (La Malinche as villain, giving rise to the term "malinchismo" for cultural self-betrayal) and a woman acting rationally in an impossible situation.
1519 Landing on the coast -- February 1519 Cortés lands on the Yucatán coast in February 1519 with 11 ships, 508 soldiers (including 13 musketeers and 32 crossbowmen), 16 horses, 14 cannon and various small arms. From the beginning he makes decisive choices that distinguish his campaign: he frees two Spanish survivors of earlier shipwrecks (Jerónimo de Aguilar, who speaks Maya, and the woman later known as La Malinche, who speaks both Maya and Nahuatl -- giving him translation capacity); he fights and defeats the Tabascans, who then give him 20 women as tribute (including La Malinche); and he establishes his first ally in Totonac territory. Before reaching central Mexico, Cortés receives his first intelligence about the great empire in the interior: the tribute collectors of Tenochtitlan appear in the Totonac territory, arrogant and confident, demanding their tribute. Cortés watches, asks questions, and begins to understand the structure of the empire he will attack.
1519 – 1520 Moctezuma's captivity -- the audacious gamble One week after entering Tenochtitlan, Cortés executes one of the most audacious political gambits in military history: he arrests Moctezuma II and holds him captive in the Spanish quarters -- the tlatoani of the most powerful empire in the Americas, held hostage by 450 foreign soldiers in the middle of his own capital city. The pretext: a skirmish on the Gulf coast in which an Aztec force kills Spanish soldiers. The strategy: with Moctezuma as hostage, the city cannot attack the Spanish without risking his death; through Moctezuma, Cortés can issue orders that appear to come from the legitimate tlatoani. The strategy works -- for approximately seven months. During this period Cortés extracts enormous quantities of gold from Moctezuma's treasury (including the legendary "Moctezuma's treasure," most of which is lost on the Noche Triste), receives submission from regional lords (in Moctezuma's name), and consolidates his position. The strategy fails catastrophically when Narváez's expedition arrives and Cortés is forced to leave the city.
1519 – 1521 Pedro de Alvarado -- the Tonatiuh Pedro de Alvarado (1485-1541), Cortés's most capable and most brutal lieutenant, is known to the Mexica as Tonatiuh ("the sun") because of his blond hair and radiant appearance -- an ironic Aztec honour for the man who commits the Toxcatl Massacre. Alvarado is the conquistador who almost destroys the conquest: his decision to massacre the unarmed Aztec nobles assembled for the festival of Toxcatl (May 1520) transforms a manageable political situation into an open revolt that leads directly to the Noche Triste and the deaths of hundreds of Spanish soldiers and thousands of Tlaxcalan allies. Whether the massacre is a preemptive strike (based on genuine intelligence of a planned attack) or a panic response by a man left in a position above his abilities is disputed. After the conquest of Mexico, Alvarado goes on to conquer Guatemala (1524) and Honduras -- campaigns of extraordinary brutality even by the standards of the conquest era. He dies in 1541 crushed by a falling horse during a minor indigenous revolt. His nickname "Tonatiuh" achieves a posthumous irony: he who bore the sun's name helps destroy the sun's people.
1519 – 1521 Sahagún -- the anthropologist of the conquest Fray Bernardino de Sahagún (1499-1590), a Franciscan friar who arrives in Mexico in 1529 and spends 60 years documenting Aztec culture, is the most important single source for our knowledge of the pre-conquest Nahuatl world -- and one of the most paradoxical figures in the history of cultural destruction and preservation. His Florentine Codex (Historia General de las Cosas de Nueva España), compiled between 1545 and 1590 through interviews with indigenous informants at the College of Santa Cruz de Tlatelolco, is a 12-volume encyclopaedia of Aztec culture: the gods, the religious ceremonies, the calendar, the merchants, the craftsmen, the daily life, the natural world, and the conquest itself as remembered by indigenous survivors. Sahagún compiles this vast documentation specifically to help the missionaries identify and combat the survival of traditional beliefs -- yet the result is the preservation of precisely the culture he wants to destroy. The Florentine Codex is both a monument to intellectual curiosity and a product of colonial power. Without it, our knowledge of the Aztec world would be immeasurably poorer.
1519 – 1521 Silver -- the engine of the world economy The silver mines of New Spain (particularly Zacatecas, discovered 1546, and Guanajuato) and Peru (Potosí, discovered 1545) produce the silver that funds the first global economy -- and directly connect the Spanish conquest of Mexico to the transformation of world trade in the 16th and 17th centuries. Mexican and Peruvian silver flows via the Manila Galleon (trans-Pacific trade route, established 1565) to China, where it is the primary currency; via Seville to Europe, where it finances the Habsburg empire and fuels inflation; and via Cadiz to the Ottoman empire and India. The silver mining operation in New Spain is built on forced indigenous labour (the repartimiento system) -- the survivors of the epidemic are conscripted to work in the mines. The mines kill workers through mercury poisoning (used in the amalgamation process to extract silver from ore) and silicosis. Yet the silver production is so enormous -- New Spain produces approximately one-third of the world's silver in the 16th-17th centuries -- that its effects on the global economy are comparable to the discovery of oil.
1519 Sinking the ships -- no retreat Before marching inland from Veracruz, Cortés takes the most dramatic decision of his campaign: he scuttles (or according to some sources, runs aground and strips for parts) his 11 ships, removing any possibility of retreat for himself and his 508 soldiers. The decision is presented as tactical necessity (he cannot afford to leave crews on the ships while marching inland) and as a demonstration of commitment to the enterprise. It is also a brilliant psychological manipulation: 508 soldiers who cannot retreat are soldiers who must fight with the desperation of men for whom defeat means death. Bernal Díaz records that many soldiers are unhappy with the decision but that Cortés's personality -- his confidence, his rhetoric, his evident intelligence -- carries them. The sinking of the ships is later compared by Spanish writers to Caesar crossing the Rubicon and to Alexander burning the boats at the Hydaspes -- a deliberate act of commitment to an irrevocable course. Whether it is strategic genius or a gambler's all-in bet is a matter of interpretation.
1519 – 1521 Technology and tactics -- what the Spanish actually had The military technology advantage of the Spanish is real but frequently overstated in popular accounts of the conquest. What the Spanish actually have: 16 horses (devastating in open battle against infantry that has never seen them, but useless in the narrow streets of Tenochtitlan); 14 cannon (effective at long range but slow to reload and useless in close quarters); 13 musketeers (with firearms that take 1-2 minutes to reload and misfire in rain); 32 crossbowmen (more reliable than muskets but still slow); steel armour (effective against obsidian weapons but hot, heavy and prone to rust); and war dogs (mastiffs and greyhounds trained to attack). Against this: the Aztec macuahuitl (obsidian sword) can cut through Spanish armour at close range; the Aztec atlatl (spearthrower) has longer effective range than a crossbow; Aztec archers can fire 6-8 arrows per minute; and the Aztec warrior is physically formidable. The real Spanish advantages are less dramatic: discipline (professional soldiers fighting to kill rather than to capture), tactical flexibility (willingness to adapt to new situations), and -- above all -- their indigenous allies.
1519 – 1521 The Aztec view of the Spanish -- gods or men? The question of whether the Aztecs initially believed the Spanish to be gods (specifically the returning Quetzalcoatl) is one of the most debated in Mexican historiography. The pro-god-belief view (traditional): Moctezuma's paralysis in the face of the Spanish advance is explained by his belief that Cortés is the returning Quetzalcoatl, whose year One Reed (1519) has arrived. The anti-god-belief view (modern scholarly consensus): this narrative is largely a post-conquest construction, developed in the years after the conquest to explain Moctezuma's decisions; contemporary indigenous sources show the Mexica quickly understanding the Spanish as powerful but mortal humans; Moctezuma's initial hospitality reflects standard diplomatic protocol for receiving powerful strangers, not religious awe. The evidence is genuinely ambiguous: some early Spanish sources (including Cortés's letters) mention indigenous references to returning gods; later indigenous sources are more clearly constructing a narrative of inevitability that makes the loss more bearable. The truth is probably neither complete belief nor complete disbelief but a genuine uncertainty in the face of an unprecedented event.
1519 The Cholula massacre -- calculated terror After concluding the Tlaxcalan alliance, Cortés marches to Cholula -- the great religious city sacred to Quetzalcoatl, the fourth-largest city in Mexico. Moctezuma's ambassadors meet him there and offer hospitality. After approximately two weeks, Cortés receives intelligence (from La Malinche, who is warned by a Cholulan woman) of a planned attack: the Cholulans intend to massacre the Spanish in a coordinated ambush. Whether this intelligence is accurate, exaggerated, or entirely fabricated by La Malinche acting in the Spanish interest is still debated. Cortés acts on it: he invites the Cholulan nobility to a courtyard conference, locks the gates and orders his soldiers to attack. Approximately 3,000 Cholulans are killed in a few hours. The massacre is a deliberate act of terror: news of it travels ahead of the Spanish column, intimidating every city-state on the road to Tenochtitlan. It is the moment when the diplomatic campaign becomes unmistakably military.
1519 – 1521 The Columbian Exchange -- food changes the world The Columbian Exchange -- the transfer of species between the Old and New Worlds following Columbus's 1492 voyage and accelerated by the conquest of Mexico -- is the most consequential ecological event of the last 500 years. From the Americas to the Old World: maize (which transforms African and European agriculture); potatoes (which feed northern Europe's population explosion); tomatoes (now inseparable from Italian, Greek and Spanish cuisine); chilli peppers (now essential to Indian, Chinese, Korean and Thai cooking); cacao/chocolate (which transforms European confectionery); vanilla; tobacco; sweet potatoes; cassava; peanuts; and turkeys. From the Old World to the Americas: horses (transforming Plains Indian culture within a century); cattle and pigs (which devastate indigenous agricultural systems and introduce new epidemics); wheat; sugar cane; citrus fruits; coffee; bananas; and the deadly epidemic diseases (smallpox, measles, typhus, influenza) that kill 90% of the indigenous American population. The Columbian Exchange is still ongoing: introduced species continue to spread; crop varieties continue to hybridise; the ecological consequences of 1492-1600 are still playing out.
1519 – 1520 The Narváez crisis -- Spanish fights Spanish In April 1520, a Spanish fleet of 19 ships carrying approximately 900 soldiers (three times Cortés's force) arrives on the Mexican coast under Pánfilo de Narváez -- sent by Cuba's governor Velázquez to arrest Cortés for his insubordination. Cortés's response is characteristically bold: he leaves Tenochtitlan in the hands of his brutal lieutenant Pedro de Alvarado with 200 men, and marches rapidly to the coast with the rest of his force. Attacking Narváez's camp at night, he defeats and captures Narváez (who loses an eye in the fighting), and persuades most of Narváez's soldiers to join him by promising them a share of the coming conquest's riches. He returns toward Tenochtitlan with a force now three times larger -- but to a crisis that his absence has created: Alvarado, fearing a religious ceremony as a planned attack, has massacred hundreds of Aztec nobles assembled for the festival of Toxcatl. The city is in revolt.
1519 – 1521 The Spanish Conquest of Mexico (1519–1521) The Spanish conquest of the Aztec empire (1519-1521) is one of the most consequential and most studied events in world history -- the destruction of the greatest pre-Columbian civilisation by a small force of European adventurers and their indigenous allies. In two years, Hernán Cortés transforms a diplomatic encounter into a conquest, destroying the Triple Alliance, razing Tenochtitlan, and establishing the colonial system that shapes Mexico for the next three centuries. The conquest is simultaneously a military campaign, a political manipulation, a demographic catastrophe (smallpox kills more than the sword), and a cultural annihilation on a scale without precedent. Yet it is also a more complex event than it is usually portrayed: the conquest is not simply Europeans defeating indigenous people but a coalition of indigenous peoples, led by Europeans, defeating a specific empire that its own subjects resent. Understanding the conquest requires understanding not just Cortés but Tlaxcala, not just Moctezuma II but Cuauhtémoc, and not just the battle but the epidemic that decides it.
1519 The Tlaxcalan battles -- the almost-disaster On the march toward Tenochtitlan, Cortés's force enters Tlaxcalan territory and is met with fierce resistance -- three major engagements over approximately three weeks in which the Tlaxcalan army (estimated at 50,000-100,000 warriors) very nearly destroys the Spanish force. The battles of Tecoac, Tzompantzinco and Tzompachtepetl are the hardest fighting of the entire campaign -- Cortés himself is wounded twice; horses are killed; Spanish soldiers are killed and their severed heads and the heads of horses are sent to neighbouring city-states as proof that the newcomers are mortal. The Spanish survive primarily because of their technological advantages (cannon, horses, steel armour) and because the Tlaxcalans fight to capture rather than kill. After the third battle, the Tlaxcalan council makes the pragmatic decision to switch sides: the Spanish have demonstrated that they can survive anything the Tlaxcalans throw at them; offering alliance is more useful than continued resistance. The most important alliance of the conquest is born from near-defeat.
1519 – 1521 The Tlaxcalan view -- liberation, not betrayal The Tlaxcalan perspective on the Spanish conquest -- preserved in the Lienzo de Tlaxcala (a post-conquest pictorial history, c.1550) and in later colonial-era Tlaxcalan historical writings -- presents the alliance with Cortés not as treachery but as liberation: the Tlaxcalans are the heroes who help defeat their oppressors, the Triple Alliance. The Lienzo de Tlaxcala shows Tlaxcalan warriors fighting alongside the Spanish in every major engagement; Tlaxcalan nobles receiving honours from the Spanish; Tlaxcala retained as a privileged, tribute-exempt city. The Tlaxcalan self-understanding is consistent: they are a free people who chose their alliance, fought bravely, and received their reward. That the "reward" -- colonial status within the Spanish empire -- proves far worse than the tribute relationship with Tenochtitlan is an irony that takes generations to fully manifest. Modern Mexican national history, which frames the conquest as a national trauma inflicted on a unified "Mexican" people, has difficulty incorporating Tlaxcala's perspective -- a perspective that challenges the narrative of unified indigenous resistance by insisting on the political diversity and rational agency of the conquered.
1519 – 1521 The brigantines -- winning the lake The 13 brigantines (flat-bottomed oared warships with a small sail) that Cortés has built in Tlaxcala and portaged to Lake Texcoco are his most creative tactical contribution to the conquest -- the decision that makes the siege of Tenochtitlan viable. The brigantines are constructed in pieces in Tlaxcala under the supervision of the Spanish shipwright Martín López, then carried over the mountains by 8,000 Tlaxcalan porters to the shore of Lake Texcoco, where they are assembled. Each brigantine carries 12 oarsmen, 12 crossbowmen or musketeers and a small cannon. The brigantines allow the Spanish to intercept Aztec supply canoes, to destroy the Mexica canoe fleet (which cannot manoeuvre against the brigantines' guns), and to support the causeway attacks from the flanks. Without control of the lake, the siege of Tenochtitlan is impossible -- the city can be supplied indefinitely by canoe. The brigantine programme demonstrates that the conquest's decisive battles are won not by Spanish swords but by Spanish engineering and logistics.
1519 – 1521 The cannon and gunpowder -- the sound of the new world The 14 cannon and approximately 13 muskets that Cortés brings to Mexico are among the most psychologically effective weapons of the conquest -- not primarily because of their destructive power (limited by the standards of later warfare) but because of the unprecedented sensory experience they create for people who have never encountered gunpowder. The cannon's report -- a sound like thunder, but horizontal, without clouds -- is genuinely terrifying on first encounter. The ball that a cannon fires can knock down multiple warriors in a row; it travels faster than any arrow; it cannot be deflected by a shield. The musket's flash and smoke add to the disorientation. The Aztec response to gunpowder weapons is rapid and rational: within days of the first encounters, their warriors are timing their movements to the moments between cannon shots and musket reloads, advancing in the gap. But the initial shock is real, and the cannon remain useful throughout the campaign -- particularly in the open terrain of the causeway approaches and on the lake from the brigantines.
1519 – 1521 The conquest and world history -- the turning point The Spanish conquest of Mexico (1519-1521) is one of the five or six most consequential events in world history -- the point at which the Americas are permanently connected to the Old World, triggering: the Columbian Exchange (the transfer of plants, animals, diseases and people between hemispheres that transforms global agriculture, demography and ecology); the beginning of modern globalisation (the silver of Mexico and Peru funds the first truly global economy); the development of modern capitalism (the colonial surplus enables European accumulation); and the beginning of the demographic and cultural transformation of the Americas that produces the modern nations of Latin America. The conquest is not a regional event but a global pivot -- the moment when the Old World's diseases, animals, plants and people begin to reshape the Americas, and the Americas's plants (maize, potato, tomato, cacao, chilli) begin to reshape the Old World. Every European who eats a tomato or a chocolate bar, every Asian who eats a sweet potato, every African who grows maize is living a consequence of the events of 1519-1521.
1519 – 1521 The conquest's enduring lesson The Spanish conquest of Mexico is one of history's most instructive events -- for what it reveals about the nature of conquest, the fragility of empires, the power of epidemics, the complexity of human motivation, and the consequences of first contact between radically different civilisations. Its lessons: that technologically sophisticated states can be vulnerable to committed minorities who exploit their internal contradictions (as the Tlaxcalans do in joining Cortés); that epidemic disease is a more powerful weapon than any army; that the destruction of a culture's written records is the most effective form of conquest; that the conquered peoples are never merely passive victims but active agents in their own history; and that the long-term consequences of conquest -- for language, food, religion, genetics, ecology -- dwarf the short-term military events. The conquest is simultaneously a unique event (no other civilisation of this scale has been destroyed in this way) and a template that has been repeated, in various forms, throughout the history of colonialism. Understanding it is not merely an exercise in ancient history but a prerequisite for understanding the world we live in.
1519 – 1521 The conquest's unanswered questions Despite half a millennium of study, the Spanish conquest of Mexico retains a series of genuinely unresolved questions that define the field of Mesoamerican history. Why does Moctezuma II not attack the Spanish immediately on their arrival, when he has the military force to destroy them? Was the Quetzalcoatl identification a real factor in his thinking or a post-conquest narrative? How did Moctezuma II actually die? How large was the Aztec sacrificial system -- 20,000 per year across the empire, or 200,000? What proportion of the pre-conquest population died in the first century after contact -- 75%, 90%, 95%? Where is the "treasure of Moctezuma" -- the gold reported to have been thrown into the lake on the Noche Triste? Is the "hidden room" in Tutankhamun's tomb real? (Wrong file -- but the question of unexplored chambers in Aztec sites is equally live.) What exactly was in the codices that Zumárraga burned? These are not trivial questions -- their answers would fundamentally change our understanding of one of the most consequential events in history.
1519 – 1521 The conversion -- Christianity in Mesoamerica The spiritual conquest of Mexico -- the conversion of the indigenous population to Christianity -- is conducted by the Franciscan, Dominican and Augustinian orders beginning in 1524, when the "Twelve Apostles" (the first twelve Franciscan missionaries, deliberately echoing the twelve apostles of Christ) arrive in Mexico City. The conversion is rapid in formal terms (millions are baptised within decades) and deeply hybrid in practice: the indigenous population incorporates Christian saints, rituals and holidays into a framework that retains pre-Columbian beliefs, practices and cosmological assumptions. The missionaries themselves are divided: some (like Zumárraga) destroy the codices and suppress traditional ceremonies; others (like Sahagún) document indigenous culture extensively in order to identify and combat it more effectively, inadvertently preserving it for posterity. The result of the conversion is not the replacement of Aztec religion by Christianity but the creation of Mexican popular Catholicism -- a distinctive tradition that combines both, exemplified by the Virgin of Guadalupe, the Day of the Dead, and the syncretism of every baroque Mexican church.
1519 – 1521 The demographic catastrophe -- the real conquest The demographic catastrophe caused by the Spanish conquest and the epidemic diseases it introduces is the most consequential aspect of the entire encounter -- dwarfing the military conflict in its human cost. The pre-contact population of central Mexico is estimated at 15-25 million. By 1600 it has fallen to approximately 1 million -- a reduction of 90-95% in 80 years. The causes: smallpox (the first and most deadly epidemic, 1520-1521; subsequent waves 1531, 1545-1548, 1576-1581); measles; typhus; influenza; and the violence, forced labour and social disruption of the colonial system. The 1545-1548 "Great Pestilence" (cocoliztli) -- now believed to be a hemorrhagic fever caused by a locally endemic Salmonella strain activated by drought conditions -- kills an estimated 5-15 million people in three years, the most lethal epidemic in recorded history by percentage of population killed. The demographic collapse is not a side effect of the conquest; it is its most enduring legacy.
1519 – 1521 The dogs of war -- mastiffs and terror Cortés brings approximately 16 war dogs to Mexico -- large mastiffs and greyhounds trained to attack humans, used in the conquest of the Caribbean and adapted for Mexican warfare. The dogs are most effective as psychological weapons: the Mexica have no large domesticated animals, no dog bred for aggression, and the sight of a mastiff -- larger than any Mexican dog, trained to attack on command -- is genuinely terrifying. The war dogs are used in the early coastal campaigns and at the Battle of Tabasco; their effectiveness in the dense urban environment of Tenochtitlan is more limited. The Spanish use of dogs against indigenous peoples is one of the most widely condemned practices of the conquest era -- las Casas and other advocates for indigenous rights specifically cite the use of dogs to tear apart prisoners and hostages. The dogs are the most viscerally brutal element of the Spanish arsenal and the one that generates the most contemporary moral horror -- which is one reason why their actual tactical role (limited in most engagements) is often overstated in both condemnatory and celebratory accounts of the conquest.
1519 – 1521 The encomienda system -- slavery by another name The encomienda system, implemented in New Spain after the conquest, is the primary mechanism of colonial exploitation -- a grant of indigenous labour to Spanish encomenderos (colonists) in return for "protection" and religious instruction. In practice, the encomienda is a form of forced labour that differs from chattel slavery primarily in theory: the encomendero does not own the indigenous workers but has the right to their labour and tribute; the workers cannot leave or refuse. The system is applied to the surviving population of central Mexico -- already decimated by epidemic disease -- and drives the construction of the colonial economy (silver mining, sugar production, cattle ranching, urban construction). The human cost is enormous: the physical demands of forced labour combined with epidemic disease accelerates the demographic collapse. The New Laws of 1542 (influenced by las Casas's advocacy) attempt to limit the encomienda; they are largely circumvented by the colonists. The system is gradually replaced by the repartimiento (forced labour draft) and eventually by nominally free wage labour as the indigenous population recovers in the 17th century.
1519 The first meeting -- Cortés enters Tenochtitlan On 8 November 1519, Cortés leads his force along the Iztapalapa causeway into Tenochtitlan -- one of the most extraordinary moments in the history of the Americas. Moctezuma II, carried in a golden litter and shaded by a great feathered canopy, meets Cortés at the causeway's junction with the city. The protocol: Moctezuma descends from his litter (his feet must not touch the ground, but he makes this exception to honour the visitors); Cortés attempts to embrace him (his attendants step forward in horror -- no one may touch the tlatoani); they exchange words through the La Malinche-Aguilar translation chain. Moctezuma offers Cortés and his force lodging in the Old Palace of Axayacatl. The Spanish, looking out from their quarters at the greatest city in the Americas, are simultaneously awed ("we were astounded," writes Bernal Díaz) and calculating. Cortés has 450 soldiers in the most powerful city in the hemisphere, 200 leagues from any reinforcement.
1519 The founding of Veracruz -- legal fiction Before marching inland, Cortés performs a remarkable legal manoeuvre: he establishes the town of Villa Rica de la Vera Cruz (Rich Town of the True Cross) and has his force elect him as its captain-general. This act of apparent governance -- founding a municipality -- transforms Cortés from the employee of the Cuban governor Velázquez (whose authority he is defying) into a representative of the Crown of Castile, reporting directly to Charles I (soon to be Charles V, Holy Roman Emperor). The legal reasoning is tortuous but effective: a municipality owes allegiance directly to the Crown; as the town's military commander, Cortés reports to the Crown rather than to Velázquez. He then writes the first of his five Cartas de Relación (Letters of Relation) to Charles V -- a masterpiece of self-justification that frames the entire expedition as a loyal service to the Crown against the obstruction of a minor colonial governor. The legal fiction holds: Charles V never formally repudiates Cortés, despite Velázquez's complaints.
1519 – 1521 The indigenous perspective -- Broken Spears The indigenous perspective on the conquest -- compiled in Sahagún's Florentine Codex (Book 12, written c.1550-1580 from indigenous informants) and in the collection known as "Broken Spears" (edited by Miguel León-Portilla from Nahuatl and Tlatelolco sources) -- is one of the most powerful and important bodies of historical testimony from any conquered people. The indigenous accounts emphasise: the confusion and awe at the Spanish arrival ("the gods have arrived" -- though modern scholars debate whether this was a contemporary reaction or a post-conquest narrative); the horror of the Toxcatl massacre; the terror of the final siege ("we are crushed to the ground; we lie in ruins. There is nothing but grief and suffering in Mexico and Tlatelolco"); and above all, the human cost -- the starvation, the disease, the loss of life. "Broken spears lie in the roads; we have torn our hair in our grief. The houses are roofless now, and their walls are red with blood." These accounts are not objective history but they are irreplaceable testimony to the experience of conquest from the inside.
1519 – 1521 The role of indigenous allies -- the real conquest The single most important corrective to the standard narrative of the Spanish conquest is the recognition that the conquest is not primarily a European military achievement but an indigenous political revolution in which European forces play a catalytic role. The numbers: Cortés's Spanish force never exceeds 1,300 men at any point; his indigenous allied forces number in the hundreds of thousands. At the siege of Tenochtitlan, the Tlaxcalan, Texcocan and allied forces constitute approximately 80-90% of the total combatants. Without these allies -- without Tlaxcala, without the Texcocan prince Ixtlilxochitl who defects to Cortés, without the dozens of subject peoples who see the Spanish arrival as an opportunity to escape Triple Alliance domination -- the conquest does not happen. The indigenous peoples who join Cortés are not traitors to an imagined "Mexican nation" (which does not yet exist) but rational actors making choices that they calculate will improve their situation. That their calculation proves catastrophically wrong -- that the Spanish system proves worse than the Aztec -- does not make them irrational, only unlucky.
1519 – 1521 The year One Reed -- prophecy and history 1519 is the year Ce Acatl (One Reed) in the Aztec calendar -- the year associated with Quetzalcoatl (born in a year One Reed, named Ce Acatl Topiltzin Quetzalcoatl) and with his predicted return from exile in the east. The coincidence of Cortés's arrival in a year One Reed, arriving from the east, bearded (as Quetzalcoatl is depicted), is the factual basis of the "Quetzalcoatl identification" narrative. Whether Moctezuma II or any other contemporary Aztec actually believed Cortés was Quetzalcoatl is now seriously doubted by most scholars -- the identification appears primarily in post-conquest sources that have reasons to construct a narrative of predestination. What the year One Reed means for Aztec historical consciousness is more nuanced: it is a year of cyclical recurrence, when the events of previous One Reed years might repeat. The arrival of strangers from the east in a year associated with transformation is -- regardless of whether "Quetzalcoatl" is invoked -- a genuinely disturbing omen in Aztec terms.
1520 – 1521 Cuitláhuac and smallpox -- the invisible weapon The 80 days between the Noche Triste and the beginning of the final siege are shaped by a factor beyond anyone's military control: smallpox. The epidemic, introduced by a slave in Narváez's force, sweeps through the densely populated lake cities with catastrophic speed. Among the dead is Cuitláhuac -- the tlatoani who replaced Moctezuma II, led the Noche Triste victory and was preparing Tenochtitlan's defence -- who dies of smallpox approximately 80 days after taking power. He is succeeded by Cuauhtémoc (c.1495-1525), a young warrior of royal lineage who leads the final defence of the city. By the time the siege begins (May 1521), smallpox has already killed perhaps 30-50% of Tenochtitlan's population -- weakening the workforce, the military and the morale of the city's defenders. The smallpox epidemic is not a side factor in the conquest but its decisive element: without it, the siege of Tenochtitlan might well fail.
1520 – 1521 Rebuilding in Tlaxcala -- preparing the siege After retreating to Tlaxcala, Cortés spends approximately eight months (July 1520 - May 1521) rebuilding his force and planning the decisive siege of Tenochtitlan. This period demonstrates his organisational genius: he solicits reinforcements from Cuba and the Caribbean coast (ships arriving with soldiers, horses and supplies); he rebuilds the Tlaxcalan alliance (whose commitment remains crucial -- the Tlaxcalans provide most of the actual fighting force for the siege); he designs and has built 13 brigantines (flat-bottomed warships for lake warfare), which are constructed in pieces in Tlaxcala and portaged over the mountains to Lake Texcoco; and he systematically subdues the cities around the lake (cutting off Tenochtitlan's supply lines). The brigantine programme is his most creative tactical decision: controlling the lake means controlling the city's ability to receive supplies or send out forces by canoe. When the siege begins in May 1521, the Spanish have lake superiority and the Mexica are already weakened by smallpox.
1520 The Battle of Otumba -- survival in the open After the Noche Triste, Cortés and his surviving force retreat toward Tlaxcala -- harassed by Aztec forces, hungry, wounded and demoralised. On 7 July 1520, at the plains of Otumba, a large Aztec army (perhaps 200,000 warriors, according to Spanish sources -- certainly a very large force) intercepts the retreating column. The Battle of Otumba is the closest the Spanish come to total annihilation after the Noche Triste -- and the moment that saves the conquest. In the midst of the battle, Cortés identifies the Aztec commander's standard-bearer (whose distinctive feathered standard marks the general's position); he charges with his remaining cavalry, kills the standard-bearer and captures the standard. In Aztec military culture, the loss of the general's standard is a signal to withdraw -- the army disengages. The Spanish, having survived by the narrowest possible margin, continue to Tlaxcala. The battle demonstrates both the limitations of the Aztec military system (dependent on command symbols rather than decentralised initiative) and Cortés's tactical brilliance under pressure.
1520 The Noche Triste -- 30 June 1520 The Noche Triste ("Sad Night," 30 June 1520) is the most catastrophic moment of the Spanish conquest -- the night when the Mexica drive the Spanish and their Tlaxcalan allies from Tenochtitlan at enormous cost. Cortés attempts a stealthy midnight evacuation across the Tlacopan causeway, carrying a portable bridge to span the gaps. The Mexica are alerted before the Spanish have cleared the first gap: war drums boom from the Templo Mayor; thousands of warriors pour into the city. On the causeway, the portable bridge fails (it sticks at the first gap, trapped under the weight of men, horses and gold). The Spanish pile into the gap -- or are pushed: soldiers drown under the weight of the gold they refuse to abandon; corpses fill the gaps and some soldiers use them as stepping stones. Estimates of Spanish dead: 450 of 1,300 (the Spanish force has grown with Narváez's men); perhaps 4,000 of Cortés's Tlaxcalan allies; dozens of horses; all the cannon; most of the gold. Cortés, reaching dry land, sits under a tree and weeps -- the famous "Tree of the Sad Night" that still stands in the Tacuba district of Mexico City.
1520 The Toxcatl massacre -- Alvarado's catastrophe The Toxcatl Massacre (May 1520) is the event that transforms a political situation into a military crisis. Pedro de Alvarado, left in command of Tenochtitlan while Cortés deals with Narváez, allows the Aztec festival of Toxcatl (a major festival of Huitzilopochtli and Tezcatlipoca involving music, dance and the sacrifice of a young man who has lived as the god's incarnation for a year) to proceed -- then, fearing an attack, orders his soldiers to seal the exits and massacre the assembled Aztec nobles. Estimates of those killed range from 600 to 3,000. The massacre has no military justification: the assembled Mexica are unarmed participants in a religious ceremony, not soldiers. The response is immediate: the city rises in revolt. When Cortés returns, he finds his garrison besieged in the Old Palace, the city hostile and Moctezuma's authority destroyed. Cortés has won against Narváez only to face a far worse crisis. The Noche Triste is now inevitable.
1520 The death of Moctezuma -- the disputed moment Moctezuma II dies on 29 June 1520 -- the day before the Noche Triste. The circumstances of his death are disputed in the sources in a way that suggests deliberate concealment by the Spanish: the Spanish account claims he was stoned to death by his own people when he appeared at a parapet to address the crowd; the indigenous accounts claim he was killed by the Spanish (stabbed or strangled). The Spanish account is internally contradictory -- why would Moctezuma try to address an angry crowd after months of captivity had destroyed his authority? The indigenous account is consistent with Spanish behavior on other occasions (Cortés later has Cuauhtémoc hanged on flimsy pretexts) and with the practical necessity of eliminating a witness to their actions. The truth may never be established. What is clear: with Moctezuma dead, Cortés has lost his primary strategic asset and must fight his way out of the city or die there.
1521 13 August 1521 -- the last day The fall of Tenochtitlan on 13 August 1521 is the end of the Aztec empire and one of the decisive moments in world history. Cuauhtémoc's capture while attempting to escape by canoe ends organised resistance. The city is unrecognisable: the causeways destroyed; the canals filled with rubble; most buildings demolished; the streets covered with bodies. Bernal Díaz's account of entering the fallen city: "The streets, squares and houses were so full of dead and sick men that our steps were impeded... the stench was so bad that no one could endure it." The Mexica survivors -- emaciated, sick, many dying -- emerge from the ruins. The Spanish and their allies loot what remains of the city's wealth. Cortés orders Cuauhtémoc tortured (his feet burned over coals) to reveal the location of the remaining imperial treasure. Little is found. The treasure of Tenochtitlan -- Moctezuma's legendary gold -- disappears into history, the canal where it sank on the Noche Triste, or the hands of soldiers who survive. The Aztec empire is over.
1521 – 2021 500 years -- the conquest remembered in 2021 The 500th anniversary of the fall of Tenochtitlan (13 August 2021) provides a moment of stock-taking on how the conquest is remembered, debated and contested in the early 21st century. In Mexico: President López Obrador's demand for an apology from Spain and the Pope; commemorations in the ruins of Tenochtitlan; Nahua communities performing traditional ceremonies at the Templo Mayor; historians debating the appropriate language (conquest? encounter? invasion?). In Spain: the government declines to apologise, arguing that 500 years is too long and that modern Spain cannot be held responsible for historical actions; but acknowledging the suffering caused. In Tlaxcala: the city formally protests being accused of "betrayal" in the standard narrative -- insisting on its own historical agency and the legitimacy of its choice in 1519. In the broader context: the 2020-2021 global wave of iconoclasm (removal of statues of colonial figures) reaches Mexico, where Cortés's statues are removed or defaced in several cities. The conquest remains one of the most politically alive events in world history.
1521 – 1600 After the conquest -- New Spain begins The decades after the conquest of Tenochtitlan are a period of colonial consolidation that transforms central Mexico beyond recognition. Tenochtitlan is rebuilt as Mexico City on the same site; the Metropolitan Cathedral is built over the Templo Mayor's foundations; the indigenous population falls catastrophically -- successive epidemics (1520, 1531, 1545-1548, 1576-1581) reduce the estimated pre-contact population of 25 million to perhaps 1 million by 1600. The encomienda system (the grant of indigenous labour to Spanish colonists) replaces the tribute system. The Inquisition begins burning the codices. Yet the colonial system is built on the foundations of the Aztec administrative structure: the same tribute provinces, the same calpolli organisation, the same routes, the same markets. The indigenous nobility retain some privileges; indigenous legal traditions are partially incorporated into colonial law. The hybrid culture that emerges -- mestizo in population, Catholic-pagan in religion, Spanish-Nahuatl in language -- is the foundation of modern Mexico.
1521 Cuauhtémoc -- the last defender Cuauhtémoc ("Descending Eagle," c.1496-1525) becomes tlatoani of Tenochtitlan at approximately 25 years old after Cuitláhuac's death from smallpox and leads the city's defence through the 75-day siege with extraordinary tenacity and courage. He is the son of the tlatoani Ahuitzotl (the greatest military commander of the Aztec empire) and cousin of Moctezuma II -- his lineage is impeccable, his determination absolute. He organises the city's defence by calpolli district, using the street-by-street knowledge of the population to maximise the cost of Spanish advances. He attempts to negotiate with allied city-states (some of whom have already joined the Spanish). When the city falls and he is captured attempting to escape by canoe, his dignity is total. Asked by Cortés where the imperial treasure is, he reportedly says nothing. When his companion cries out as his feet are burned over coals, Cuauhtémoc asks: "Am I now in a bed of roses?" He is hanged by Cortés in 1525 on dubious conspiracy charges. He is the supreme hero of Mexican national identity.
1521 – 1550 Las Casas -- the voice against conquest Fray Bartolomé de las Casas (1484-1566) is the most important European critic of the Spanish conquest -- the Dominican friar who campaigns relentlessly against the mistreatment of indigenous peoples and whose "Brevísima relación de la destrucción de las Indias" (A Short Account of the Destruction of the Indies, 1542) provides the most detailed and horrifying contemporary account of Spanish colonial violence. Las Casas's account is deliberately extreme (he wants to shock the King of Spain into reforming colonial policy) and has been criticised for exaggeration and for serving the "Black Legend" of Spanish cruelty. Yet his core claim -- that the indigenous peoples are being systematically mistreated, enslaved and killed by the colonial system -- is unquestionably true. Las Casas's advocacy contributes directly to the "New Laws" of 1542 (which attempt to limit the encomienda system) and to the Valladolid Debate of 1550-1551 (the first international debate on the rights of conquered peoples). His moral legacy is one of the most important in the history of human rights.
1521 – 2026 Memory and meaning -- how Mexico remembers the conquest How Mexico remembers the conquest reveals the tensions at the heart of Mexican national identity. The dominant 20th-century narrative (shaped by the muralists Diego Rivera, José Clemente Orozco and David Alfaro Siqueiros, and by the official PRI nationalist ideology) frames the conquest as a trauma inflicted on the indigenous people of Mexico by foreign invaders, with the mestizo (mixed) people of modern Mexico as the heirs of both victim and perpetrator. The Aztec ruins are a source of national pride; the Spanish colonial heritage is complex; the indigenous peoples of the present are caught between being symbols of the nation's glorious past and marginalised citizens of its present. The 500th anniversary of the conquest (2021) sees Mexico's president López Obrador demand a formal apology from Spain and the Vatican for the conquest -- a demand Spain and the Pope decline. The debate about whether the conquest was conquest (a crime) or encounter (a meeting of cultures) is not merely academic but actively political.
1521 The siege -- 75 days The siege of Tenochtitlan (May-August 1521) is one of the most brutal urban battles of the 16th century. Cortés divides his force into three columns advancing along the three causeways simultaneously, supported by the 13 brigantines on the lake. The Spanish advance systematically destroys the city: every building is demolished as the Spanish advance (to prevent ambush); the canals are filled with rubble (to allow horses and cannon to move); the causeways are destroyed to cut off resupply. The Mexica defence exploits the city's canal system: as the Spanish advance and fill a canal, the Mexica dig another, cut off the Spanish retreat, and attack from multiple sides. Multiple times the Spanish advance is repulsed with heavy casualties -- Cortés himself is nearly captured in one engagement. Smallpox, starvation and thirst progressively weaken the defenders. Cuauhtémoc refuses all offers of negotiation. On 13 August 1521, after 75 days, he attempts to escape by canoe and is captured. The city is in ruins. The population is perhaps a quarter of its pre-siege size.