When Cronus gained a new child he always ate them in the fear that they would one day over power him. Rhea decided that she was tired of losing children so she hid Zeus, and gave Cronus a bolder instead of the baby.
Zeus was raised on Crete by nymphs and the Cretans clashed their swords to cover the sound of Zeus's crying
When Zeus got older he was ready to overthrow his father. He went to Metis and she made a potion that would make Cronus throw up Zeus's siblings and the rock.
Zeus,Hades, and Poseidon fought the Titans for 10 years with the help of 300 armed giants and cyclopes. The Cyclopes forged a thunderbolt for Zeus to use as a weapon ,and in the end the Titans where overthrown.