The Precursors are recorded to be the most advanced species to inhabit the Milky Way, and the only to attain the status of Tier 0 on the Forerunner Technological Achievement Tiers. Praised by the Forerunners for gaining the ability to leave the Milky Way, and their supposed ability to accelerate the evolution of organic life, the Precursors were seen as the original rulers of the Milky Way. Throughout their reign in the Milky Way, the Precursors were noted to have created weapons, starships, ad technology of unparalleled advancement.