DUAT (pronounced do-aht) was the realm of the dead in ancient Egyptian mythology. The deity Osiris was believed to be the lord of the underworld since he personified rebirth and life after death, being the first mummy as depicted in the Osiris Myth. The DUAT was the region through which the sun god Re traveled from west to east each night, and it was where he battled Apep, who embodied the primordial chaos which the sun had to defeat in order to rise each morning and bring order back to the earth.