Tlatelolco's Conquest by Tenochtitlan (1473): Aztec Civil War

The conquest of Tlatelolco by Tenochtitlan in 1473 was a short but decisive war between two Mexica (Aztec) cities that shared the same island in Lake Texcoco. Under its ruler Axayacatl, Tenochtitlan defeated its twin city, killed the Tlatelolca ruler Moquihuix and took control of the richest market in Mesoamerica. The victory removed the last internal rival to Tenochtitlan’s power within the growing Aztec Empire.

Background: two Mexica cities on one island

According to Mexica tradition, a group split away from Tenochtitlan soon after its founding in 1325 and settled on a neighbouring islet to the north, which became Tlatelolco. Its traditional founding date is 1337 or 1338. The two settlements grew so close that by the 15th century they were effectively one urban area divided by a canal.

Each city had its own ruler (tlatoani) and its own patron lineage. Tlatelolco’s first king, Cuacuauhpitzahuac, was a son of the Tepanec ruler of Azcapotzalco, while Tenochtitlan’s dynasty had different alliances. After the defeat of Azcapotzalco and the formation of the Aztec Triple Alliance in 1428, Tenochtitlan became the senior Mexica city, but Tlatelolco kept its independence.

Tlatelolco’s strength lay in trade. Its long-distance merchants, the pochteca, travelled across Mesoamerica, and its marketplace drew buyers and sellers from the whole Valley of Mexico. That wealth made Tlatelolco a valuable ally and a possible rival.

Causes of the war

Tensions grew under Moquihuix, who became ruler of Tlatelolco around 1460, and Axayacatl, who took the throne of Tenochtitlan in 1469. The colonial chronicles, especially Diego Durán’s history based on Mexica sources, describe a personal quarrel. Moquihuix was married to Axayacatl’s sister, often named as Chalchiuhnenetzin, and the accounts say he neglected and mistreated her, and that she warned her brother of a plot.

Historians treat these stories with some caution, because they were recorded decades later and largely from the winners’ point of view. The deeper causes were political and economic: Tenochtitlan wanted full control of the Mexica heartland, its trade and its tribute. The sources also say Moquihuix tried to win support from other towns around the lake against Tenochtitlan, which made the conflict an open challenge.

The war of 1473

Fighting broke out in 1473 and was fought largely in the streets and canals between the two cities. Tenochtitlan’s warriors pushed into Tlatelolco and advanced on its central temple precinct. The promised help from other towns did not arrive in strength.

The final struggle took place at Tlatelolco’s main pyramid. According to the chronicles, Moquihuix was killed at its summit, either thrown down or falling during the fight. With his death the resistance collapsed and Tenochtitlan took the city.

Consequences

Tlatelolco lost its independence. Instead of its own hereditary king, it was ruled by military governors appointed from Tenochtitlan and had to pay tribute and provide services. The Tlatelolca were reportedly humiliated with insulting duties, an episode the Tenochca later remembered with pride.

The market, however, kept working. It remained the commercial heart of the Aztec world, and its merchants continued their long-distance trade, now under Tenochtitlan’s control. The victory strengthened Axayacatl’s position, although only a few years later he suffered a crushing defeat against the Tarascan Empire in 1478.

Key people

• Axayacatl (ruled 1469–1481) was the sixth ruler of Tenochtitlan and a grandson of Moctezuma I through his mother. He was known as a war leader, and the victory over Tlatelolco was one of the high points of his reign.
• Moquihuix (ruled c. 1460–1473) was the fourth and last independent ruler of Tlatelolco. The Tenochca chronicles portray him harshly, so his own motives are hard to judge.
• Chalchiuhnenetzin was Axayacatl’s sister and Moquihuix’s wife. Her story, as told in the chronicles, turned the war into a family drama, but her historical role is known only from these later accounts.

Legacy

When the Spanish arrived in 1519, Hernán Cortés and Bernal Díaz del Castillo described the Tlatelolco market with amazement. Cortés claimed that more than sixty thousand people traded there daily, a figure that may be an exaggeration but shows the market’s scale.

Tlatelolco also played a final role in Aztec history. During the fall of Tenochtitlan in 1521, the defenders made their last stand in Tlatelolco, and Cuauhtemoc, the last Aztec ruler, was captured nearby on 13 August 1521. After the conquest, Franciscan friars founded the College of Santa Cruz de Tlatelolco there in 1536. Today the site forms part of the Plaza of the Three Cultures in Mexico City.

Timeline

• 1325: Traditional founding date of Tenochtitlan.
• 1337 or 1338: Traditional founding of Tlatelolco by Mexica who left Tenochtitlan.
• 1428: Tenochtitlan, Texcoco and Tlacopan form the Triple Alliance after defeating Azcapotzalco.
• c. 1460: Moquihuix becomes ruler of Tlatelolco.
• 1469: Axayacatl becomes ruler of Tenochtitlan.
• 1473: Tenochtitlan defeats Tlatelolco; Moquihuix dies at the main temple.
• 1519: Spanish conquistadors visit and describe the Tlatelolco market.
• 13 August 1521: Cuauhtemoc is captured during the last fighting around Tlatelolco.

Why it matters

The war of 1473 ended more than a century of rivalry between the two Mexica cities and gave Tenochtitlan undisputed control of the Aztec heartland and its greatest market. It shows how the Aztec Empire grew not only through conquest abroad but also through power struggles among close neighbours.