Mission to CASTLE Base

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Outbreak on Installation 00

Mission to CASTLE Base
HSOR FullCover Art.jpg


Created conflict


October 2559


CASTLE Base, Highland Mountains, Viery Territory, Reach



Unnamed alien faction



The Mission to CASTLE Base was an operation undertaken by SPARTAN-II Blue Team during the Created conflict.[1]


The Fall of Reach[edit]

Main article: Fall of Reach

In August 2552, Reach fell to the onslaught of the Covenant. Late in the battle, the SPARTAN-IIs were deployed onto Reach to help defend the planet's orbital defense generators from assault to give the UNSC Navy a fighting chance in the concurrent space battle. During the engagement, many Spartans were killed and more injured, with the majority of survivors eventually retreating to CASTLE Base, including Team Alpha and Team Delta. There, they met up with Doctor Catherine Halsey, who had been escorted to the site by Jun-A266 following the enaction of Operation: WHITE GLOVE on SWORD Base. Here, she worked to enact the operation on CASTLE, destroying all of the AIs present in the facility including Araqiel and Kalmiya, before using self-destruct charges on the base to ensure any materiel inside did not fall into Covenant hands.

The group survived in the Titanium mines beneath the facility, and were eventually later extracted by John-117 and the other survivors of the Battle of Installation 04 during the Raid on Reach.

The Created[edit]

Main article: Created conflict

In October 2558, a force of artificial intelligences known as the Created, led by Cortana and the Warden Eternal alongside an army of Prometheans, rose up and began to subjugate the Milky Way galaxy. A year following this rise, Blue Team were deployed from UNSC Infinity to CASTLE Base to investigate assets hidden in Halsey's laboratory that may have survived the base's destruction, and help to lead to the defeat of the AI uprising. The team consisted of John-117, Frederic-104, Kelly-087 and Linda-058, who had begun to employ their own variants of the MJOLNIR Powered Assault Armor (GEN3).[1]

By this time, an unidentified alien faction had begun to occupy Reach and the remnants of CASTLE base.[1]

The Battle[edit]

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List of appearances[edit]