Aztec History and Society

In the Late Postclassic, about 1300 to 1521, central Mexico contained many Nahuatl-speaking communities, often called Nahua peoples, with their own rulers and histories. The Mexica of Mexico-Tenochtitlan, now Mexico City, became the strongest member of the Triple Alliance with Texcoco and Tlacopan. “Nahua” refers broadly to related communities and speakers; the Mexica were one specific people, and the Triple Alliance was their three-city coalition. The broad modern label “Aztec” describes this political world.

On this page11 sections

Historical development

Mexica settlement traditions tell of a migration guided by their patron god Huitzilopochtli and the founding of Tenochtitlan, conventionally dated to 1325. For more than a century, the Mexica served stronger neighbors, especially the Tepanec city of Azcapotzalco. After the Tepanec ruler Tezozomoc died in 1426, a succession struggle set his son Maxtla against Tenochtitlan and Texcoco. Their alliance defeated Maxtla in 1428 and joined Tlacopan in a new coalition.

During the fifteenth century the three rulers campaigned beyond the Basin of Mexico. Tenochtitlan became the leading partner, collecting tribute from communities extending toward both coasts and into southern Mexico. Conquest did not always replace local dynasties: many rulers stayed in office under an obligation to supply goods or military support. The Spanish-led alliance that took Tenochtitlan in 1521 included Indigenous communities with their own political aims, among them Tlaxcala. Siege, hunger, loss of fresh water, fighting and epidemic disease devastated the capital. The Triple Alliance’s independent rule ended, while Nahua towns and leaders continued to shape local life under Spanish authority.

Lands, peoples and languages

The Basin’s lakes and surrounding land connected with warmer valleys, mountain routes and coastal provinces. The high Basin had lakes, marshes, slopes and cultivated valleys. In the southern lakes, farmers built chinampas, raised beds of soil and vegetation threaded between water channels. The channels kept the plots watered and let canoes carry workers and harvests. Communities in warmer Morelos could grow cotton, while other regions supplied salt, timber, feathers, stone and foodstuffs. Their differing environments fed household use, markets and political tribute.

Mexica identity, Nahuatl speech and allegiance to the Triple Alliance were not interchangeable. Nahuatl was widely used across the allied capitals and beyond, but neighboring communities spoke Otomí, Matlatzinca, Mazahua, Totonac, Mixtec and Zapotec as well. Tlaxcala shared Nahua language and culture with the Mexica yet remained an independent confederacy of city-states. People could share language without sharing political allegiance.

City-states and imperial government

An altepetl was a city-state joining a people and its territory to a ruling dynasty, local lands and labor, a founding tradition and a patron deity. It could make war, conduct diplomacy and pay or receive tribute. Tenochtitlan, Texcoco and Tlacopan each kept a ruler and capital after the alliance formed, although the three were unequal: Tenochtitlan was strongest, Texcoco a close second, and Tlacopan the smallest partner. Their rulers consulted and combined forces, and previously conquered allies could join campaigns and share spoils.

In Tenochtitlan the tlatoani, or ruler, held office for life; a council chose a successor from the ruling family. A close adviser, the cihuacoatl, handled political, military and judicial duties, while the tlatocan council assisted government. Local calpulli communities had leaders and councils of elders who organized field and public work, assigned duties and managed neighborhood worship. Tribute officers collected supplies through these local structures. Many conquered rulers remained in place if they acknowledged the alliance and met obligations; in rebellious or strategically important places, an allied ruler could instead install a governor or garrison. Tenochtitlan’s conquest and military governorship of neighboring Tlatelolco in 1473 shows direct intervention close to the capital.

Frontiers and defence

Independent Tlaxcala and the Purépecha state limited expansion. Tlaxcala lay east of the Basin; the Purépecha state, called Tarascan in many colonial accounts, lay to the west. Both retained their rulers and territory despite repeated Mexica campaigns. In the Oztuma–Cutzamala corridor of modern Guerrero, the alliance’s fortress at Cerro Oztuma faced the Purépecha garrison town of Cutzamala. Nearby Chontal communities maintained their own defended hilltop settlements, so the borderland held an imperial garrison, local strongholds and a rival state’s post.

Walls could also control a particular road rather than mark a whole boundary. In 1519, Hernán Cortés described a dry-stone wall in the Puebla highlands on the route toward Tlaxcala, with a bent entrance that forced travelers around an outer section. At Tenochtitlan, causeways crossed Lake Texcoco and wooden bridges interrupted them. The bridges carried daily traffic but could be removed in war; during the Spanish retreat in 1520, Mexica defenders had taken out bridge sections along the causeway.

Warfare and military organization

Campaigns required planning routes, camps and provisions. The Florentine Codex, a Nahuatl and Spanish manuscript compiled by the Franciscan friar Bernardino de Sahagún with Nahua collaborators and completed in 1577, describes rulers and commanders estimating travel time and summoning provincial stewards, or calpixques, to bring food, weapons, cloaks and other supplies. Arms were distributed to soldiers and provincial nobles who joined with their own men. The account presents campaigning as a coordinated obligation linking the ruler, local officials and allied contingents.

Sahagún’s colonial-era account says boys began learning about warfare at fifteen and went to battle at twenty. Before a campaign, relatives hosted veteran fighters and asked them to teach and protect a young warrior. In battle, experienced men showed him how to defend himself, attack and take a captive. A tuft of hair at the nape marked a youth without a notable achievement; a shared capture could earn the right to cut it, while recognized captures brought insignia and titles. Captains counted captives by contingent and sent the ruler names as well as totals, making individual service visible.

Weapons included the macuahuitl, a wooden close-combat club fitted with sharp blades of obsidian, a volcanic glass, and the atlatl, a spear-thrower for launching darts. Archers, slingers, spearmen and fighters with clubs carried wooden shields and padded cotton armor. Campaigns could pursue submission, tribute, punishment or access to routes and territory; capturing enemies also brought status and fulfilled ritual obligations. The recurring conflict between the Triple Alliance and the Tlaxcala-Puebla kingdoms from about 1455 to 1519 is now called the Flower Wars. Historian Barry L. Isaac argues that this prolonged conflict reflected the Alliance’s inability to conquer the region despite strong incentives to do so.

Culture and arts

Buildings, objects and records depended on trained makers and access to materials. Tenochtitlan’s Templo Mayor had twin stairways leading to summit shrines: Tlaloc, associated with rain and agricultural fertility, to the north, and Huitzilopochtli, associated with war, to the south. Rulers enlarged the temple repeatedly, building over earlier versions while keeping the paired plan. At nearby workshops, stone carvers shaped volcanic rock and greenstone with hard stone, cords, water and sand; goldworkers hammered metal into sheets or cast it in molds; lapidaries cut, drilled and polished stones. Featherworkers arranged plumes into shields and headdresses worn as regalia, using feathers brought from distant provinces.

Painted books and carved inscriptions recorded rulers, dates, tribute and ceremony. The Codex Mendoza, made around 1542 by Nahua and Spanish collaborators, depicts earlier campaigns and the goods assessed from towns. The Florentine Codex, completed in 1577 with Nahua elders, writers and painters, places Nahuatl and Spanish texts in parallel columns with illustrations. It describes occupations, religion, calendars and the conquest. Youth houses and temple schools tied instruction to work and service: boys swept, carried wood, tended fires, sang and learned ritual or military duties. Household teaching and craft apprenticeship also transmitted skills.

Economic relationships

Household production supplied meals, exchange and imposed obligations. Basin farmers raised maize, beans, squash, chile and amaranth in fields, terraces, irrigated valleys and lake gardens. In warmer valleys, people spun cotton into thread and wove cloth. Households consumed their harvests, stored food, sold goods or delivered some production through local obligations.

Markets connected people who produced different goods. In 1520 Cortés described Tlatelolco’s market beside Tenochtitlan, where sellers clustered by merchandise and sold food, medicines, pottery, building materials and cotton thread. Porters carried loads, while barbers and prepared-food sellers offered services. Buyers paid by count or measure. Cacao beans and lengths of cotton cloth called quachtli could serve as exchange media; there were no minted metal coins. Professional merchants called pochteca organized long-distance trade, while oztomeca specialized in distant routes.

Tribute moved goods through political obligation rather than a negotiated purchase. Cortés says provincial governors and collectors kept pictorial accounts of what each province owed. The Codex Mendoza’s Tochpan page shows seven towns assessed garments, feather shields, beads and dried chiles. Producing these goods involved cotton cultivation and weaving, specialist featherwork and access to valued stones. The same products might appear in markets, but tribute transferred them because a community owed a ruler, not because a buyer and seller agreed on a price.

Messengers and information

Envoys and messengers carried reports between rulers, armies and communities. In Sahagún’s account, a first messenger announced a victory and captives, but the ruler waited for confirmation. Officers counted the captives and later sent a second report naming who had taken each one. The court could then match honors to particular service rather than rely on a single announcement. During the Spanish arrival, emissaries who had met Cortés returned by canoe and road to report on the newcomers’ weapons, food and equipment.

Merchants also carried diplomatic messages. Before entering hostile territory, a trading party sent word ahead asking for safe reception; armed local leaders met and escorted them. Sahagún’s Book 9 describes merchants who entered unconquered Tzinacantlan in present-day Chiapas in local clothing and spoke the local language while exchanging obsidian blades and needles for amber and feathers. They reported the region’s resources and political conditions to senior merchants and then the ruler. Painted records carried additional information: figures and signs could show places, quantities and tribute claims, while interpreters supplied spoken explanations.

Claims concerning property and conduct reached different authorities. Sahagún describes several rooms in the ruler’s palace for criminal cases, commoners’ civil claims and matters involving military nobles. In a land or house dispute, judges could ask for a painted representation of the property and then question witnesses about what they had seen or heard. His account also criticizes judges who delayed a ruling to seek a bribe or favor a relative, and describes the ruler punishing a group of judges reported to have acted unjustly.

Merchants had senior leaders who heard offenses within their trading community, while market judges resolved disputes among sellers and buyers. Cortés describes inspectors walking among stalls and breaking false measures, while judges seated in a market building heard disputes among buyers and sellers.

Religion and sacred authority

Communities maintained patron cults, temples and obligations toward sacred powers. At Templo Mayor, the paired shrines joined rain and agricultural fertility with the Mexica’s patron war god. The temple’s repeated enlargement kept worship at the political center of Tenochtitlan. During Stage II, dated 1376–1427, builders placed a sacrificial stone in the south shrine; enemy warriors were sacrificed there in honor of the Sun. Excavators also found funerary urns with burnt bones and valuable objects inside the Huitzilopochtli shrine, and a later offering of objects associated with Tlaloc beneath a temple stage.

Worship also took place in homes and through trained attendants. The Florentine Codex says wealthy people held feasts for Xiuhtecuhtli, the fire god, offering quail and copal, an aromatic tree resin burned as incense. Temple attendants swept floors, tended braziers (fire containers), served priests and kept night watch. The 260-day count paired thirteen numbers with twenty day signs. A separate 365-day year had eighteen twenty-day months plus five extra days; together the same calendar pairing returned after 52 years, a turn marked by the New Fire ceremony.

Legacies and later adaptations

Nahua contributors made colonial manuscripts, preserved knowledge and used pictures to support legal claims. The 1531 Huexotzinco Codex recorded goods and services demanded by Spanish officials in a lawsuit over excessive tribute. The community’s painted pages documented quantities and helped it win the case. In the same period, Nahua artists combined featherwork with Christian images for new patrons and campaigns.

At the Colegio de Santa Cruz in Tlatelolco, Nahua physicians, scholars, elders and painters produced works in Nahuatl, Spanish and Latin, including a 1552 herbal by Martín de la Cruz translated by Juan Badiano. Sahagún’s later Florentine Codex gathered Nahua knowledge and histories in two languages and pictures. Local leaders continued to negotiate government and obligations within colonial institutions. Nahua communities and languages persisted beyond the end of Mexica imperial rule.

For the wider setting, see Aztec History and Surviving Sites.