Arc 17The Astartes and the Frontier
Umbrella crushed Hozette’s operations, developed controllable Aliens and Astartes, and contained a dangerous organism on Barnard b. William then brought non-UNSC nations into the UNSC and expanded Umbrella’s reach, leaving the story with Yelena and Ivan arriving at Jiu Hai Colony.
- Andre ordered Umbrella to expose Hozette’s crimes and prevent the UNSC from interfering as Hunk, Kent, and Achilles led trainees to arrest its executives and seize its research facility.
- Recovered records revealed that Hozette’s experiments had produced a Xenomorph Empress whose escape caused the devastating outbreak on Sirius-4.
- Halsey and Rebecca created a Reverse Strain Alien Empress from Green’s genes, and William approved testing the Aliens before making John and the other candidates into Primarchs.
- John led the newly created Astartes in a battle against Green’s Aliens, while Green told William that the Aliens were her children and William promised not to use them for Astartes training.
- On Barnard b, Kevin escaped containment and Reynolds ordered the anomaly and its host incinerated before Umbrella destroyed the planet’s surface with hydrogen bombs.
- William met with UNSC and non-UNSC delegations, persuaded the holdout nations to join the UNSC, and secured their agreement to host Astartes on their colonies.
- By 2023 and 2024, Umbrella had expanded its fleets, agents, and Astartes across its colonies, while Jiu Hai Colony grew into a protected lunar metropolis.
- Yelena and Ivan Russell arrived at Jiu Hai Colony with their school groups.