The Maritime Raid Force (MRF) is the
smallest task force in the Marines and operates under the
Marine Expeditionary Unit (MEU) ... specializing in
operations conducted on structures in or near bodies of
water. MRF utilizes speed and stealth to take enemy forces
by surprise and secure their target. The MRF organizes each
task force based on the needs of a given mission, but it is
composed of three platoons ... force reconnaissance for
assault, amphibious reconnaissance for support, and
battalion landing for security. Other specialists such as
explosive ordinance disposal technicians, military
information support operators, and biological specialists
are involved as required.
U.S. Marine Corps video
by Cpl. Devan K. Gowans July 2018