Orbital Defense Generator Facility A-331 (Earth-5875)

Orbital Defense Generator Facility A-331 was the largest orbital defense generator on Reach, powering the colony's orbital defense platforms.

History
During the Fall of Reach, Facility A-331 was protected by SPARTAN-IIs, who were unable to fully defend the base. The Covenant broke through the UNSC's defenses and bombarded it with plasma, killing all SPARTANs and UNSC Marines defending the base.

Most Marines were killed when GA-TL1 Longsword pilots bombarded the area because of a calculation error. By the time Red Team arrived in the facility, only four Marines of Charlie Company were alive.