The chief god of the Aztec pantheon associated with the sun and war is Huitzilopochtli. He is revered as the god of warfare, guiding the Aztecs in battle and ensuring victory. Additionally, Huitzilopochtli played a crucial role in the Aztecs' migration and was integral to their identity and cosmology. Festivals and rituals dedicated to him often involved human sacrifices, reflecting the cultural significance of warfare and the sun in Aztec society.