SPARTAN-III Project

Introduced in the novel "Halo: Ghosts of Onyx" the Spartan-IIIs are the next generation in the Spartan series, this time led by Colonel Ackerson and other members of ONI Section III. It is believed that the S-III project is unknown to others within the UNSC, possibly even those within ONI. At this point, it is unclear as to if these new soldiers will make an appearance in Halo 3 or any other subsequent games that take place within the Halo universe.

Background
((spoiler)) Beginning in October of 2531, the Spartan-III project was spearheaded by Colonel James Ackerson as a way to try and introduce more Spartan supersoldiers into the battlefield as a way to try and mimic the astounding success of the Spartan-IIs without the costs and time required to produce them and their MJOLNIR battle armor.