The FCC holds power over all Nations and Colonies by a use of subversion, bribery and fear. Each Nation and Colony has its own unique Military with national flavour, this military is subseviant to the FCC.
The FCC is made up of:
Administration - Civillians with status and power, though low level Adminers only have power over none FCC.
Navy (Fleet) - Starships and fighters, have a small dedicated infantry onboard ship