Battle for Zeta Halo

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Previous:	Battle for the Domain Razing of Oth Sonin
Concurrent:	Battle of Earth Battle of Boundary
Next:	Battle of Suban
Battle for Zeta Halo
Clockwise from top left: The UNSC Infinity being rammed by a Banished dreadnought, Elena Bobrov and UNSC Marines watching a Banished patrol, the boat crew looking over the remains of the ring, the House of Reckoning, Fernando Esparza helping to brief an awakened John-117, and Atriox using a device to find the Xalanyn.
Conflict:	Post-Covenant War conflicts Created uprising
Date:	December 12, 2559–
Location:	Installation 07, Ephsu I, Ephsu system (December 12, 2559) Installation 07, unknown star system (from December 13, 2559, onwards)
Outcome:	Ongoing as of 2560 UNSC Infinity lost to Banished forces. UNSC forces severely depleted and scattered across Installation 07. Destruction of Cortana and consequent deactivation of the Guardians. Installation 07 sustains severe structural damage and 117649 Despondent Pyre is destroyed. Installation 07's new location broadcast to UNSC space by the boat crew and received by the Swords of Sanghelios. Recovery of John-117 by Echo 216. Deaths of Escharum, the Harbinger and several other high-ranking members of the Banished, creating a power vacuum and throwing the Banished into chaos. Discovery of the Endless by Atriox.
Details Belligerents UNSC Navy Marine Corps Swords of Sanghelios Banished Hand of Atriox Bloodstars Legion of the Corpse-Moon Ravaged Tusks Harbinger's Skimmers Forerunner constructs Adjutant Resolution's Forerunner constructs Created (December 12, 2559) Commanders CAPT Thomas Lasky CDR Sarah Palmer MCPO John-117 CDR Wes Thompson Warmaster Atriox War Chief Escharum† Harbinger† Adjutant Resolution Cortana† Strength UNSC Infinity 7,150 personnel 1+ escort fleet† 6+ Mulsanne-class light frigates† Many air vehicles 3+ D80 Condors Multiple Pelicans AV-49 Wasps 1 hijacked Eklon'Dal Workshop Phantom Many ground vehicles M808 Scorpions M12B Warthogs M12R Rocket Warthogs M12 Chaingun Warthogs M15 Razorbacks M290 Mongooses Multiple Spartans 4 Spartan-IIs Multiple Spartan-IVs Hundreds of ground troops Numerous ODSTs Numerous marines Multiple Sangheili Banished fleet At least 8 dreadnoughts Many air vehicles Barukaza Workshop siege-haulers Drop bases Drop pods Phantoms Banshees Kaelum Workshop Banshees Multiple Kywasky Workshop Gorespike cannons