In 1325, you have the city of Tenochtitlan form on this island in Lake Texcoco, and initially, Tenochtitlan is one of the weaker city states around Lake Texcoco. You see many of these city states, some of the stronger ones, you have Texcoco right here, and in particular, you have Azcapotzalco. But as we fast forward roughly 100 years, you get to a situation where Azcapotzalco falls into a civil war. Their ruler dies, and there's a succession battle, and the various city states around Lake Texcoco take sides. What eventually happens is Tenochtitlan, Texcoco, and Tlacopan form what is known as a triple alliance or the triple alliance, and are able to conquer the Azcapotzalco, and so in conquering the Azcapotzalco, what you have forming is known as the Aztec Empire. Now it starts as an alliance between these three city states and other city states in the area, but over time, Tenochtitlan, which is sometimes referred to as Mexico-Tenochtitlan, because it is a city state of the Mexico people, and this is where the name Mexico or Mexico actually comes from. Now even though it's an alliance, over time, Tenochtitlan essentially becomes the capital of this alliance or the capital of this Aztec Empire, which continues on for roughly 100 years until 1521, when it is defeated by Hernando Cortes.