The Repository

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Shield World 0725, alternatively known to the Forerunners as "the Repository" and to the UNSC as Deep-Space Anomaly 0199 was a Conservation-class shield world built by the . Built long before the induction of the Forerunner-Flood wars, Repository was built as a place to store and test many of the Forerunner's prototypes, such as warships, weapons, etc. Repository was the birth place of the and others types of warships that were later widely used in conflicts, and was the place where the first was created, which was significantly different than the other ones which were taken control of by in 2558.
Sometime before 2477, the UNSC detected the presence of the Shield World and sent the UNSC Sansad, a in order to inspect the planet. After making a rather rough landing, the UNSC researchers and Marines of the ship tried to explore the area when they were mysteriously killed, possibly by Sentinels. Before the ship was sent, the UNSC logged the world as Deep Space Anomaly 0199, mistaking it for another space installation of unknown origin just like and did not know that it was a planet until the ship arrived. However, since the ship and its crew never returned, the UNSC wasn't aware of it until 2552.
A huge portal to Repository was present in a massive Forerunner structure present on the human colony world of Deston. During the Second Battle of Deston, the Covenant attacked the planet in order to reach and inspect the Forerunner structure. Various teams of Marines and some of Spartans, such as GAUNTLET Team and Team Corvo were deployed in order to fight the invaders. They entered the Forerunner structure and were quickly ambushed by a Covenant force led by Jez 'Varum when a Jackal accidentally activated the portal to the Repository. Soon after, a battle ensued, during which many Covenant soldiers learned of the actual nature of the Halos and the Forerunners, and reluctantly allied with the humans. They used the prototype Guardian and destroyed the warships, as well as later destroying the Guardian itself by using the various nukes and the reactor of the UNSC Sansad. After Repentant Instigation and all the Sentinels were destroyed, the planet was deemed safe to be inhabited, and after the Human-Covenant War ended, the UNSC settled on the planet, primarily for mining.
Category:Megastructures
Category:Forerunner