Ages of Reclamation (Earth-2042)

The Ages of Reclamation were a series of events in the Covenant history during which the true search for the Halos began. It was the final age of Covenant history, as the Covenant split apart in the Great Schism at the conclusion of the age. The Ninth Age of Reclamation was the time in which the Clone Wars occurred, and began when the Minister of Fortitude became the Prophet of Truth and declared war on the Galactic Republic. The Age of Reclamation is represented by Forerunner metal.

Source

 * https://www.halopedia.org/Ages_of_Reclamation