The Hekatonkheires received their name because they each have a hundred arms, fifty on each side of their bodies. Despised by their father, the Hekatonkheires were thrown into Tartarus alongside their brothers, the Elder Cyclopes, guarded by the monster Kampê. Many years later, Zeus, alongside his brothers and sisters, freed the Hekatonkheires and the Elder Cyclopes from their prison so that they might help them in their war against the Titans. During the war, the Hekatonkheires threw rocks at Mount Othrys, the Titans' base, reducing the mountain to half its original size. After the Titanomachy, the Titans were cast into Tartarus, and Zeus appointed the Hekatonkheires to be their jailers. 