Algolis

Algolis is a former human colony planet in the Algol system. It is known to possess at least two moons. The planet housed a relatively small civilian population and was home to some of the Office of Naval Intelligence's research and development projects for prototype weapons, including the HRUNTING/YGGDRASIL Mark I ADS.

Topography
The surface of Algolis features large landmasses with seas interspersed throughout. Some of these landmasses are known to have rocky terrain.

Locations

 * Weapons Research Facility T12A

Known residents

 * Paul DeMarco

Rise of humanity
Human colonization efforts on Algolis began in 2475.

Human-Covenant war
The Office of Naval Intelligence's Section Three had facilities on the planet, to which several SPARTAN-II augmentation chemical precursors were sent without Dr. Catherine Halsey's consent, likely in order to be researched for Project CHRYSANTHEMUM.

Algolis Invasion
The colony was attacked by the Covenant in 2549, some time prior to March 28. During the battle, the planet's civilians were evacuated while Marines from the UNSC Marine Corps of Engineers made a last stand against Covenant forces. The UNSC destroyer was en route to the planet to secure a powered armor before the facility was attacked. The planet's survivors escaped in transport ships to a UNSC frigate in orbit that carried them to safety. The battle also resulted in the formation of the Banished as well. Overall, it's unknown what happened to the colony following the battle, though it evidently went un-glassed by the Covenant.

List of appearances

 * Halo Legends
 * Prototype
 * Halo: Evolutions
 * Midnight in the Heart of Midlothian
 * Halo Wars 2
 * Halo: Rise of Atriox
 * Halo Infinite