The STARFLEET Marine Corps (SFMC) is a group affiliated with STARFLEET, The International Star Trek Fan Association Inc.. The SFMC is considered an office under and reports to the Vice Commander, STARFLEET. Fictionally, the SFMC is part of the Ground Forces (rarely seen in episodes but assumed to be part of the Naval Fleet of the United Federation of Planets).
As STARFLEET members, they pay regular dues and their membership requirements remain the same. Prior military service is not required. One exception – the member must be in good standing within STARFLEET. SFMC has different promotional rank names and organizational structures than the Naval portion of STARFLEET. SFMC takes part in the local chapter, Regional and Fleet-wide activities, and occasionally will hold their own separate activities, e.g., from paintball or laser tag to fundraising events like Toys for Tots or blood drives.
Additionally, SFMC has its own Academy – the STARFLEET Marine Corps Academy (SFMCA).