In Aztec mythology, the god of war and sun is Huitzilopochtli. He is a principal deity associated with the sun's power and military strength. Huitzilopochtli played a significant role in the Aztec belief system, where he was linked to the sacrifices made for the sun's survival. His worship involved elaborate festivals and rituals, emphasizing the importance of warfare in Aztec culture, as well as the conception of divine favor and protection.