Over the five years following Demeter, the MCOR, along with the Militia as a whole, metamorphosed from rag-tag guerillas to a proper army with logistics, industrial centres and organization. While the MCOR now has its own sub-groups such as the 41st Militia Rifle Battalion, the restructure in Militia command sees them answer as a sub-unit to the newly-formed special forces branch, the Special Recon Squadron.
↑Reddit Q&A: "Part of the evolution of the Militia at this juncture resulted in restructuring of the paramilitary apparatus. Marauder Corps was restructured as one of several sub-units (Corps) within the newly formed SRS (Special Recon Squadron). SRS represents an elite branch that exists parallel to the other major branches of the new Militia structure, alongside the equivalent concepts of say, what one might call the Army, Navy, etc."