The Corps of Royal Marines (RM) colloquially known as SCM Marines is the Empire's mobile light infantry force, forming part of Interstellar Command (RN). The Royal Marines were formed during the diaspora as Interstellar Command's infantry troops. However the marines can trace their origins back to the formation of the "Charadin Prime Militia Assault Force" in the earliest days of the Civil War.
As a highly specialized and adaptable light infantry force, the Marines are trained for rapid deployment sector wide and capable of dealing with a wide range of threats. The Marines are organized into a light infantry brigade and a number of separate units as well as a unit committed to the highly specialized Krylos Guard Battalion and Sentinal Squadron which is responsible for the Capital, Senate and Royal Family's security respectivley. The Corps operates in all environments and climates, though particular expertise and training is spent on amphibious warfare, arctic warfare, mountain warfare, expeditionary warfare, and its commitment to the SCM's Rapid Reaction Force.