Final answer:
The Aztec civilization worshipped Huitzilopochtli, the god of war, as one of their principal deities. They were based in what is now central Mexico and their empire thrived from the 13th century until the Spanish conquest.
Step-by-step explanation:
The civilization that worshipped Huitzilopochtli was the Aztec civilization. Huitzilopochtli was the Aztec god of war and was highly revered within Aztec culture. He was central to their religious practices, which included human sacrifices to ensure the sun would rise anew each day.
The Aztecs were the cultural inheritors of a long tradition of Mesoamerican civilizations such as the Olmecs, Mayas, and Teotihuacanos. The Aztec Empire flourished in what is now central Mexico, beginning in the 13th century. Their capital, Tenochtitlan, was an impressive city-state and the hub of their religious and political life. In the Aztec pantheon, Huitzilopochtli held a place of great importance and became associated with the sun and war.