Battle of Azcapotzalco
AzcaputzalcoDuring a disputed Tepanec succession, Maxtla killed his brother and usurped the throne then laid siege to Tenochtitlan. An alliance of opponents under Nezahualcoyotl drove Maxtla back to siege at Azcapotzalco, which fell after 114 days, and the tyrant was executed. Tenochtitlan, Texcoco and Tacuba then created the Triple Alliance, which became the foundation of the powerful Aztec Empire.