Second Onyx conflict

On October 29, 2558, a new conflict was sparked on the Forerunner shield world Onyx after the joint occupying forces of the United Nations Space Command (UNSC) and the Swords of Sanghelios came under attack by the Servants of the Abiding Truth, only for both sides to be caught by surprise by the appearance of a Guardian and its armiger complement as part of the wider Created takeover across known space. This marked the second major conflict in the Zeta Doradus system after the three-sided Onyx Conflict in the final months of the Human-Covenant War in late 2552.

Servants of Abiding Truth incursion
In October 2558, the Servants of Abiding Truth managed to gain access to Onyx. Once they stepped foot onto the portal sight, it wasn’t long before they swiftly eliminated all nearby humans. Soon after the Servents found a larger site where most of there forces on Hesduros could be transported to to set up and fortify there new encampment at a cathedral. Pax forces attempted to find them immediately, but couldn't.

Created conflict
On October 28, 2558, The Reclamation began with the leader of the Created, Cortana, delivering an ultimatum across the galaxy. This message was heard on Onyx in the middle of the night.

Prelude
The Servants' invasion was complicated however, due to the start of the The Reclamation and the rising of a Guardian on Sarcophagus. When the Guardian invaded Onyx, the students at the Pax Institute were brought back inside by Kasha 'Hilot and evacuated to the lunchroom. Due to the conflict, classes ended early, but the teachers decided not to send their students home right away due to the dangers outside. Some students protested and questioned Kasha on why they couldn't be sent home early, despite some of them living near the Institute. Kasha informed them that the school is the safest place for everyone. Some of the students believed they would be safer at home and suggested voting on it. However, Kasha told them her decision was final. Soon enough, various battles began to take place on the shield world. The shield world was returned to its slipspace bubble for protection and the Huragok Prone to Drift managed to destroy the Guardian.

Aftermath
However, despite all three factions suffering heavy casualties in the conflict, the Servants were far from defeated. Having learned of the death of his father and the destruction of Jul's Covenant, Dural announced to his people that only the Servants of the Abiding Truth stood between the Arbiter and utter victory over the Sangheili factions. Dural intended to rebuild his forces in a Forerunner warship docked on Mackintosh and take the shield world from the humans and the Swords of Sanghelios before using the technology that they recovered there to take the fight back to Sanghelios and take it back from the Arbiter.

List of appearances

 * Halo: Legacy of Onyx