page_title: Aztec Empire
section_title: Early years of expansion
hierarchical_section_title: Aztec Empire / History / Early years of expansion
caption_attribution_description: Map showing the expansions undertaken by various Aztec rulers.
context_page_description: The Aztec Empire, or the Triple Alliance, was an alliance of three Nahua altepetl city-states: Mexico-Tenochtitlan, Texcoco, and Tlacopan. These three city-states ruled the area in and around the Valley of Mexico from 1428 until the combined forces of the Spanish conquistadores and their native allies under Hernán Cortés defeated them in 1521.
  The Triple Alliance was formed from the victorious factions of a civil war fought between the city of Azcapotzalco and its former tributary provinces. Despite the initial conception of the empire as an alliance of three self-governed city-states, Tenochtitlan quickly became dominant militarily. By the time the Spanish arrived in 1519, the lands of the Alliance were effectively ruled from Tenochtitlan, while the other partners in the alliance had taken subsidiary roles.
  The alliance waged wars of conquest and expanded rapidly after its formation. At its height, the alliance controlled most of central Mexico as well as some more distant territories within Mesoamerica, such as the Xoconochco province, an Aztec exclave near the present-day Guatemalan border. Aztec rule has been described by scholars as "hegemonic" or "indirect".
context_section_description: After the defeat of the Tepanecs, Itzcoatl and Nezahualcoyotl rapidly consolidated power in the Basin of Mexico and began to expand beyond its borders. The first targets for imperial expansion were Coyoacan in the Basin of Mexico and Cuauhnahuac and Huaxtepec in the modern Mexican state of Morelos. These conquests provided the new empire with a large influx of tribute, especially agricultural goods.
  On the death of Itzcoatl, Moctezuma I was enthroned as the new Mexica emperor. The expansion of the empire was briefly halted by a major four-year drought that hit the Basin of Mexico in 1450, and several cities in Morelos had to be re-conquered after the drought subsided. Moctezuma and Nezahualcoyotl continued to expand the empire east towards the Gulf of Mexico and south into Oaxaca. In 1468, Moctezuma I died and was succeeded by his son, Axayacatl. Most of Axayacatl's thirteen-year-reign was spent consolidating the territory acquired under his predecessor. Motecuzoma and Nezahualcoyotl had expanded rapidly and many provinces rebelled.
  At the same time as the Aztec Empire was expanding and consolidating power, the Purépecha Empire in West Mexico was similarly expanding. In 1455, the Purépecha under their king Tzitzipandaquare had invaded the Toluca Valley, claiming lands previously conquered by Motecuzoma and Itzcoatl. In 1472, Axayacatl re-conquered the region and successfully defended it from Purépecha attempts to take it back. In 1479, Axayacatl launched a major invasion of the Purépecha Empire with 32,000 Aztec soldiers. The Purépecha met them just across the border with 50,000 soldiers and scored a resounding victory, killing or capturing over 90% of the Aztec army. Axayacatl himself was wounded in the battle, retreated to Tenochtitlan, and never engaged the Purépecha in battle again.
  In 1472, Nezahualcoyotl died and his son Nezahualpilli was enthroned as the new huetlatoani of Texcoco. This was followed by the death of Axayacatl in 1481. Axayacatl was replaced by his brother Tizoc. Tizoc's reign was notoriously brief. He proved to be ineffectual and did not significantly expand the empire. Apparently due to his incompetence, Tizoc was likely assassinated by his own nobles five years into his rule.
caption: Map of the expansion of the empire, showing the areas conquered by the Aztec rulers.[31]
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