The Titan Hera and the mother of Zeus had to have her last baby in secret because her husband Kronos was swallowing his children so they would not overthrow him like the prophecy his mother told him , Hera had her child on the island of Crete and hid him in 2 caves so her husband would not know.
when Zeus was old enough , his grandmother Gaia sneaked him into his fathers room and gave him a drink that would make him throw up , and Kronos took the drink without realizing his son was in front of him .
when Kronos drank the drink , he threw up his children that he had swallowed many years ago, they couldn't die because they were immortal , as Zeus's brother's and sisters thanked him and escaped .
a great war happened between the gods and titans, Zeus needed a weapon to overcome his father and uncles; zeus's weapon wold be a lighting bolt and he'd win the war with it
when Zeus won the war between his father and himself he ct up his father in a million pieces , he banished Kronos to tartas the deepest part of the underworld .
Zeus then went to rule over mount Olympus and his brothers and sisters played their role over what they powers were and they all knew Zeus was their master and gods of all gods.