Weapons Research Facility T12A (Earth-5875)

Weapons Research Facility T12A was a research facility of the Office of Naval Intelligence's Watershed Division in the Inner colony Algolis.

History
In mid 2513, the HRUNTING Mark III Cyclops was developed at the facility by Watershed Division. Decades later, the facility became the hub for the construction of the HRUNTING/YGGDRASIL Mark I ADS as a part of Project YGGDRASIL.

On July 20th, 2548, during the Battle of Algolis, the UNSC Marine known as Ghost wore the HRUNTING/YGGDRASIL Mark I ADS himself to destroy Covenant in a last stand on the planet to save its survivors. After all remaining civilians and Marines had escaped from the vicinity of the base, Ghost activated the exoskeleton's self-destruct system to prevent the Covenant from acquiring, killing himself in the resulting nuclear blast.