 No early source gives any reason for the conflict, but Apollodorus' account seemingly implies that Typhon had been produced by Gaia to avenge the destruction, by Zeus and the other gods, of the Giants, a previous generation of offspring of Gaia.According to Apollodorus, Typhon, "hurling kindled rocks", attacked the gods, "with hissings and shouts, spouting a great jet of fire from his mouth.