Information about Titans Mythology - Zeus and Cronus
The first generation of Titans were the children of the primeval gods Gaia and Uranus. Cronus had overthrown his parents who had warned him that he would also be betrayed and replaced by his children. To prevent this dire prophecy from coming true Cronus, the ruler of the Titan gods and goddesses and husband of Rhea, swallowed each of his children as they were born. The names of the children were Hestia, Demeter, Hera, Hades, and Poseidon. As the children were immortal, this did not kill them, they remained trapped inside the body of Cronus. Rhea grieved for the loss of her children and when she gave birth to Zeus she tricked her husband Cronus by substituting the baby Zeus with a rock wrapped in swaddling clothes. Cronus swallowed the rock believing he had removed the threat to his rule. Zeus released his brothers and sisters, who were still living in the stomach of Cronus.
Titans Mythology - The Battle of the Titans (the Titanomachy)
The children of Cronus, the New Titan gods, became embroiled in a ten year conflict with the older generation of gods and the Battle of the Titans (the Titanomachy) began. The New Titan gods fulfilled the old prophecy and would be referred to as the Olympians as their base was on Mount Olympus. For additional information about Titans Mythology refer to the Battle of the Titans - the Titanomachy.