The chief god in the Aztec pantheon is Huitzilopochtli, who is associated with the sun and war. He is revered as a powerful deity representing victory, sacrifice, and the sun's life-giving energy. Huitzilopochtli was believed to lead the Aztecs in their conflicts and was central to human sacrifice, an integral part of their religious practices to appease him. He embodies the warrior spirit and the eternal struggle for sustenance and survival.