---
node: na_triple_alliance
type: organization
slug: aztec_triple_alliance
title: "Aztec Triple Alliance"
lead: "The Aztec Triple Alliance was the coalition of the city-states Tenochtitlan, Texcoco, and Tlacopan that formed the Aztec empire. It dominated central Mexico from 1428 until the Spanish conquest."
published: 2026-07-13
updated: 2026-07-13
---

## What it was

Formed in 1428 after the overthrow of the Tepanec city of Azcapotzalco, the alliance bound three altepetl (city-states) in a pact to share conquest and tribute. Tenochtitlan steadily became the leading partner.

## Role

The alliance conquered a broad tribute empire across Mesoamerica, drawing goods, labor, and captives from subject peoples. It ruled through tribute and indirect control rather than a unified administration.

## Fate

Resentment among tributary peoples helped the Spanish and their allies destroy the alliance in 1521. Its capital became Mexico City and the seat of New Spain.