This article is an orphan, meaning few or no articles link to it.Please help by introducing links to this page. Sector 331 on a map. Sector 331 is a region on the surface of the planet Earth. During the Battle of Earth, at least one engagement between the UNSC and the Covenant was fought there. List of appearancesEdit Halo 3 Crow's Nest (First appearance) (Mentioned only) SourcesEdit ↑ Halo 3, campaign level Crow's Nest Retrieved from "https://halo.fandom.com/wiki/Sector_331?oldid=1793616" Categories: Orphaned articles Earth Halo 3 Human-Covenant war Places UNSC Sectors Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.