Battle of Netherop (2559)

After the discovery of an ancient weapon that destroyed a Guardian Custode was made, an operation took place on Netherop to claim it, starting a conflict between the UNSC and the Swords of Sanghelios, the Banished, and Nizat 'Kvarosee's faction.

The Created
In October 2558, a force of artificial intelligences known as the Created, led by Cortana, alongside an army of Prometheans, rose up and began to subjugate the Milky Way galaxy. A year following this rise, the UNSC and their Sangheili allies were still trying to find a way to stop Cortana's rule. An xenoarchaologist, Keely Iyuska, was interested in learning and study the remnants of an ancient non-Forerunner civilization on the planet Netherop, site of a battle between the UNSC and the Covenant decades earlier. When the Created rised, she couldn't realise her plans. On November 2559, however, Iyuska was contacted and founded by a benefactor to study Netherop and its technology. During her studies, Iyuska managed to find records indicated that a Guardian Custode was sent to subdue Netherop, and that the planet's civilization had managed to defeat the construct. Instead of informing her benefactor, Iyuska travelled to Sanghelios and inform Spartan Olympia Vale about her discovery.

The Banished
During his time on Installation 00, Atriox was able to find records on a crashed Phaeton about an ancient weapon on Netherop that managed to destroy a Guardian Custode. Months later, during Operation: WOLFE, Atriox was able to return to the Milky Way via a portal complex under the Menachite Mountain on Reach, were he started his plans to claim the weapon on Netherop and then start his campaign to take Installation 07 from Cortana. To further their plans, Eto 'Saljhoo funded Keely Iyuska's investigation about the former civilization on Netherop, with the condition that any artifacts Iyuska would find, it would be delivered to him. When Iyuska didn't hold her promise, 'Saljhoo hired the Oath Warden Crei 'Ayomuu to track Iyuska. Weeks after the Warmaster's return, Cortana tried to summit Atriox and the Banished under her command, with no success; in retaliation, Cortana used her Guardian Custodes to destroy Doisac and its moons.

List of appearances

 * Halo: Outcasts