Itzcoatl (Aztec Emperor): A Detailed Biography

Itzcoatl
Itzcoatl from the Tovar Codex.
Itzcoatl was the fourth Aztec Emperor, which was referred to as the huey tlatoani (Great Speaker). This article details the history and significance of Itzcoatl in relation to the Aztec Empire.

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Itzcoatl ruled as huey tlatoani of the Aztecs from 1427 to 1440 and played a significant role in formation of the Aztec Triple Alliance with Texcoco and Tlacopan. Also, he led military campaigns that against the regional rivals of Tenochtitlan. This helped to establish the Aztecs as a dominant force in the Valley of Mexico.

EARLY HISTORY OF THE AZTEC

Following the Aztec’s founding and construction of Tenochtitlan in the Valley of Mexico in 1325 AD, they quickly established their authority across the other societies in the valley.  Historians refer to this time period as the Aztec Empire, since the Aztec were constantly expanding throughout central Mexico.  As well, for the two centuries that followed the initial construction of Tenochtitlan, the Aztec were ruled over by a series of leaders referred to as Huey Tlatoani.  In the Aztec language of Nahuatl this translates to ‘Great Speaker’.  Each huey tlatoani ruled in different ways but they all oversaw the expansion of both Tenochtitlan and the Aztec Empire until the arrival of the Spanish conquistadors in 1519.

Aztec Triple Alliance
Texcoco, Tenochtitlan and Tlacopán of the Triple Alliance. (Osuna Codex)

ITZCOATL (AZTEC EMPEROR) – BIOGRAPHY AND SIGNIFICANCE

Itzcoatl became the leader of the Aztec in 1427 and became the fourth tlatoani of the Aztec people.  He was the brother of Huitzilíhuitl and the son of Acamapichtli.  Itzcoatl reigned over the Aztec Empire from 1427 until 1440, and is best remembered as the leader who saw the Aztecs become the most powerful Mesoamerican society in the Valley of Mexico.  For example, as leader he famously formed an alliance with two other societies in the area in order to overthrow their mutual rivals.  The Aztecs, Texcoco and Tlacopan joined forces in 1428 to create the Triple Alliance.  Together they fought against the Tepanec and challenged them for superiority in the Valley of Mexico.  Over time the three were able to overpower all other societies in the Valley of Mexico.  As well, the Aztec became the strongest of the Triple Alliance and Tenochtitlan became the center of power in the region.  During the reign of Itzcoatl, Tenochtitlan grew considerably with new temples, public buildings, and causeways to the shore of Lake Texcoco.  The Aztec Empire grew out of the Triple Alliance and spread at this time across large areas of Mexico.  Itzcoatl died in 1440 and was replaced as tlatoani of the Aztec by his nephew Moctezuma I.

Aztec Emperors
Aztec Emperor, Itzcoatl, from the Codex Mendoza.
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AUTHOR INFORMATION
Picture of Elias Beck

Elias Beck

I'm a passionate history and geography teacher with over 15 years of experience working with students in the middle and high school years. I have an Education Degree with a focus in World History. I have been writing articles for History Crunch since 2015 and love the challenge of creating historical content for young learners!
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