Walkthrough.
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Information[]
The Halo array is 12 ring worlds, currently 7 ring worlds. They were used to kill off sentient life in the Milky Way, to starve the Flood. They also had samples of species so the Forerunners could reseed the galaxy after the rings fired.
Installations 01, 02, 03, 06, 07, 08, 09, 010, 011, 012, and Greater Ark.[]
Information unknown. Some destroyed.
Installation 04[]
Destroyed and swarmed by Flood. See Battle of Installation 04.
Installation 05[]
Taken by the Covenant Empire. See Battle of Installation 05.
The Ark[]
Heavily damaged, casualties: Weather controls. Destroyed Installation 04B. See Battle of the Ark.