History of the Aztecs and the Aztec Empire. In the fifteenth and sixteenth centuries, the Aztec Empire ruled Mesoamerica for about one hundred years, stretching from Mexico and Guatemala to the regions of Salvador and Honduras. This dominance lasted from the fifteenth to the sixteenth century.
Tenochtitlan, Texcoco, and Tlacopan were the original members of the loose alliance that would later become the Aztec empire. Tlacopan was the most junior partner. As a result of this, people referred to them as the ″Triple Alliance.″
Although the term ″Aztecs″ is frequently used to refer only to the Mexica of Tenochtitlan, it is also commonly used to refer to Nahua polities or peoples of central Mexico during the prehispanic era as well as the Spanish colonial era (1521–1821). This is despite the fact that the term ″Aztecs″ is often used to refer only to the Mexica of Tenochtitlan.