In Greek mythology, the Titanomachy occurred before the Gigantomachy. The Titanomachy is the epic battle between the Titans, led by Cronus, and the Olympian gods, led by Zeus. This cataclysmic struggle established the Olympians as the new ruling deities of the universe.
Following the defeat of the Titans, the Gigantomachy arose as the next significant conflict, where the Giants, offspring of Gaia, attempted to overthrow the Olympians. This battle symbolized the struggle for order and civilization against chaos.
Thus, chronologically, the Titanomachy is the first major conflict, paving the way for the later Gigantomachy as part of the overarching narrative of power shifts among divine beings in Greek mythology.