Zeus' father Cronus had been eating his offspring. Zeus' mother, Gaia, tricked Cronus by giving him a rock in blankets to eat instead of baby Zeus. Zeus was hidden from Cronus and grew up in Crete. He sought out his father when he was old enough in order to save his siblings and exact revenge.
Ares had an affair with Goddess of Love, Aphrodite, whilst Aphrodite was married to Hephaestus. Hephaestus concocted a plan to catch the two in the act, and crafted an invisible net to ensnare them whilst they were laying together in bed. Not satisfied with this humiliation, Hephaestus then invited all of the Olympian Gods to witness Ares and Aphrodite trapped together.
Known as the Clash of the Titans or Battle of the Gods, Zeus was a key warrior in the Titanomachy, the battle between the Olympian Gods and his father Cronus' Titans. The Olympians defeated the Titans and Zeus became recognised as the King of the Gods. He shared the world with his two brothers, Poseidon and Hades. Zeus received the heavens, Poseidon the seas, and Hades the underworld.