This ruler did a lot to consolidate the Aztec civilization, and to expand its borders. During his rule, the empire stretched to the Gulf of Mexico. In the triple alliance of three great cities, Tenochtitlán began to solidify its place as the "capitol city". He led a successful campaign against the Mixtec peoples. He led the construction of the Chapultepec aqueduct, which was completed in 1466 after 13 years of labour.