150,000 BCE
From Halopedia, the Halo wiki
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- In 150,000 BCE (approx.), The Forerunners rise as the preeminent species in the Milky Way Galaxy by advancing technological discoveries gathered from the remnants left by prior ancient races. Believing themselves responsible for the lives of all those less advanced then they, the Forerunners initiate the Mantle.[1] The Forerunners believed humanity to have "moved their interstellar civilization outward along the galactic arm" around this time, possibly to escape Forerunner control.[2]
Sources
- ^ Halo Encyclopedia, page 26
- ^ Halo: Cryptum, "chapter 1", ("She responded that to the best of Forerunner research, humans had indeed first arisen on Erde-Tyrene, but over fifty thousand years ago had moved their interstellar civilization outward along the galactic arm, perhaps to flee early Forerunner control. Records from those ages were sparse.")
