Actually, there were various creation stories in ancient Babylon, but the one that has become well known is a myth having to do with Marduk, Babylon’s national god.
... However, Apsu was killed by one of these gods, Ea, and when Tiamat sought to avenge Apsu, she was killed by Ea’s son Marduk, who then split her body, using half of it to form the sky and using the other half in connection with the earth’s establishment.