In 1428, they formed a Triple Alliance among neighbors, one of whom defeated them at the Battle of Otumba.
These peoples was organized under the calpulli clan system. Ethnographical books on these peoples include the Duran and the Florentine codices. This group bypassed irrigation by creating soil islands in shallow water and planting on it, an agricultural method called the chinampa system. In 1428, they formed a Triple Alliance among neighbors, one of whom defeated them at the Battle of Otumba. Ritualistic battles fought with rivals of this empire are called the Flower Wars, and one of those rivals assisted European adversaries in capturing their city on Lake Texcoco at La Noche Triste. For 10 points, name this Meso-American empire conquered by Hernan Cortes, whose rulers included Montezuma.
These peoples was organized under the calpulli clan system. Ethnographical books on these peoples include the Duran and the Florentine codices.
Aztecs [prompt "Mexica" (meh SHEE ka); prompt "Nahua"]