The Titanomachy

The Titanomachy was the war between the Titans and the Gods.  It lasted for ten years.  For nine years, the two sides fought with neither being able to gain an advantage.  In the tenth year, Zeus, under the advice of Gaia, frees the Hecatoncheires.  With the help of these gigantic creatures, Zeus and the Gods finally defeated the Titans, who were then imprisoned inside of Tartarus.

Source(s):

  1. HesiodTheogeny.