Outbreak on Installation 00

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Outbreak on Installation 00
Conflict:	Post-Covenant War conflicts Second Ark Conflict
Date:	June 4-5, 2559
Location:	High Charity ruins, Installation 00
Outcome:	Banished/Forerunner construct Victory Atriox forced to abandon several key outposts Many UNSC and Banished troops infected 40% of the Clan of the Long Shields wiped out Sentinel defense network reactivated Flood contained High Charity sealed off once again and scoured of the Flood Access codes to Anodyne Spirit retrieved from High Charity's data stores Forerunner entanglement dish recovered by the Banished
Details Belligerents Banished Clan of the Long Shields Flood Sentinels UNSC Commanders Atriox Pavium Voridus Proto-Gravemind N/A Captain James Cutter Strength Hundreds of infantry and vehicles Hundreds or thousands of Flood forms Hundreds or thousands of Sentinels Light reconnaissance teams Casualties Extremely heavy Several Banished outposts 40% of the Clan of the Long Shields Total Proto-Gravemind Hundreds of Sentinels destroyed Several Retrievers Presumably heavy

"I'll look around. And if we find prizes to bring it back, how could that go wrong?"

— Voridus

The Outbreak on Installation 00 was a large-scale outbreak of the Flood on the Ark in 2559.

Prelude

High Charity explodes.

At the end of the Human-Covenant War, Covenant and Human forces clashed at Installation 05, discovering the large-scale outbreak of the Flood there. The Flood would eventually take over the UNSC In Amber Clad and use it to transport the parasite aboard High Charity, the holy city of the Covenant. The Fall of High Charity followed in the onset of the Great Schism, resulting in the Flood taking control of the titanic space station and the billions of residents therein.

In December of 2552, the UNSC and last remnants of the loyalist Covenant found their way to the extragalactic megastructure known as Installation 00. During the ensuing fighting, the Gravemind would use its knowledge to transport High Charity to the installation, with the hulk of the city crashing on the surface and peppering the surrounding landscape with debris and Flood forms. Spartan John-117 and Arbiter Thel 'Vadam would travel to the city to extract the AI Cortana from the Gravemind's clutches, in the process destroying some of the still-operational power reactors in the city. The three would escape the city as it exploded beneath them, believing the Flood threat to be finished.

Following the faulty firing and destruction of Installation 08 and the damage it dealt to the Ark, the vast majority of the Flood were destroyed. Because Installation 08 was incomplete and falling apart, a few Flood survived the faulty firing. The installation's monitor, 000 Tragic Solitude, began to construct a sterilized Quarantine Zone around the wreckage of High Charity, ensuring that no life could survive around the site that the Flood may potentially use for sustenance. For seven years, the few surviving Flood inside the rubble of High Charity festered, until the arrival of the UNSC Spirit of Fire and the Second Ark Conflict in 2559 provided them with a food source.