At the beginning of the Battle of Mombasa, a half-hearted defense including a M247 General Purpose Machine Gun was set up in Sector 0-5, but was overwhelmed by Covenant ground forces. Shortly afterward, the Pelican carrying John-117, Sergeant Major Avery J. Johnson, and several other Marines was shot down by a marauding Scarab and crashed in Sector 0-5. They quickly overtook the Covenant controlling the area and held off several attacking waves of Covenant, culminating in battling a Hunter pair. Meanwhile, another Pelican carrying Sergeant Stacker, Lance Corporal Jones and Privates Butkus, Walpole, and O'Brien crashed and they battled Covenant forces and set up a stronghold in Hotel Zanzibar.
Sector 0-5 has a robust economy, featuring various business. Some smaller scale businesses like Hotel Zanzibar and the Voi Theater operate within the Sector. Large interstellar companies also have offices in the sector too, such as Vyrant Telecom and Nomolos Refining.