One hundred years before its fall, the Aztec Empire went through an incredible change. The emperor’s son, Tlacaelel, declared that the god of war, Huitzilopochtli, was to be the highest of all gods.From then on, the Aztecs lived in service of the god of war. Human sacrifice became a massive part of Aztec society, with hundreds of thousands of people slaughtered each year as offerings to the gods.