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In 2553, the UNSC descended upon the Montero Cave System. They declared the cave system restricted. Casualties were mounting due to these efforts, which in turned fueled a silent coup against the Gao Republic from the Gao Minister of Protection Arlo Casille. The prescence of the UNSC also disrupted trade in the nearby Orso system.
- Main article: Battle of Gao
- Founder’s District
- Campos Wilderness District
- ↑ Halo: Last Light - Chapter 1, Page 1 (Digital)
- ↑ Halo: Last Light, Page 262 (Digital)
- ↑ Halo: Last Light, Page 5-67
- ↑ Halo: Last Light - Chapter 23, Page 316 (Digital)
- ↑ Halo: Retribution - Chapter 1, Page ??
- ↑ Halo: Last Light - Chapter 21, Page 264 (Digital)
- ↑ Halo: Last Light, Page 375 (Digital)