The Aztec Empire originated from a group of nomadic people who settled in Mexico City after seeing an eagle perched on a cactus with a snake in its beak, as their gods had foretold. They established the city of Tenochtitlan on an island in Lake Texcoco. Over time, Tenochtitlan grew into a major city with causeways connecting it to the mainland, aqueducts, sewers, plazas and large markets. The Aztec ruler Montezuma sacrificed tens of thousands of prisoners at a time to appease the gods like Huitzlopochtli, the sun and war god, believing this would ensure the sun's victory over the forces of