Battle Group Omicron

Battle Group Omicron was a formation of the UNSC Navy commanded by Admiral Carl Patterson. The battle group comprised nine ships, with the carrier serving as Patterson's flagship. On November 3, 2552, the battle group was redirected from the embattled planet Earth to Onyx. Their mission was to retrieve Dr. Catherine Halsey and a joint unit of Spartan-IIs and Spartan-IIIs, along with examples of Forerunner technologies that had allegedly been discovered on Onyx.

Onyx Conflict
Battle Group Omicron rendezvoused with the prowler soon after entering the Zeta Doradus system. The UNSC ships engaged the Covenant fleet under Fleet Master Voro Nar 'Mantakree and took losses, including, which was sacrificed to save Stalingrad from Covenant plasma torpedoes. Following this engagement, Admiral Patterson ordered a withdrawal. The battle group temporarily went into hiding behind Onyx's moon.

Meanwhile, Dusk prepared a nuclear minefield as a trap for the unsuspecting Covenant fleet. The UNSC lured the Covenant into the minefield, destroying the entire Covenant fleet save for two badly damaged destroyers. The four remaining ships of Battle Group Omicron moved in for the kill with the six MAC rounds that remained among them. Before this could happen, however, 30 Sangheili warships arrived and swiftly destroyed the remaining human vessels, save Dusk, which ultimately became the only ship to survive the battle.

Composition

 * One carrier
 * One
 * Six destroyers
 * One
 * One
 * One
 * One
 * One

List of appearances

 * Halo: Ghosts of Onyx
 * Halo Mythos