The Fifth Regiment was a regiment of the Starfleet Marine Corps active during the Four Years War between the United Federation of Planets and the Klingon Empire. (FASA RPG: The Four Years War)

Colonel Wilhelm Mann'dela was the OIC of the Fifth Regiment, which was based on the planet Rudgur.

United Federation of Planets Starfleet Marine Corps regiments
2nd Regiment • 4th Regiment • 5th Regiment • 8th Regiment • 12th Regiment • 13th Regiment • 47th Regiment