When Earth had bore her children, Heaven had imprisoned the hundred-handed fifty-headed monsters even though they were his sons. Earth called for help from her children, and only Cronus stood up for her. Cronus wounded his father and finally he ruled the universe along with his fellow Titans.
Eventually, Rhea bore Zeus. Zeus engaged in a war between him and his siblings against the Titans. The Titans lost the battle, and they were punished mercilessly. Only one Titan, Prometheus sided with the gods.