The following is the April 23, 2025, the Congressional Research Service report, the U.S. Marine Corps Marine Littoral Regiment.
Background
In March 2020, the U.S. Marine Corps (USMC) announced a major force design initiative planned to occur over 10 years originally referred to as “Force Design 2030” which is now known as “Force Design.” Under Force Design, the Marines are redesigning forces to place a stronger emphasis on naval expeditionary warfare. As part of the redesign, the Marines plan to establish at least three Marine Littoral Regiments (MLRs) organized, trained, and equipped to accomplish a number of missions within contested maritime spaces.
MLR Missions
According to the Marines, the MLR is to be capable of the following missions:
- Conduct Expeditionary Advanced Base Operations (EABO), a form of expeditionary warfare involving the employment of naval expeditionary forces. Selected Marine and Navy forces are to be arrayed in a series of austere, temporary locations ashore within a contested or potentially contested maritime area to conduct sea denial and control and fleet sustainment operations.
- Conduct strike operations with a variety of systems.
- Coordinate air and missile defense operations.
- Support maritime domain awareness.
- Support naval surface warfare operations.
- Support information operations.
The MLR’s Operational Environment
The Commandant of the Marine Corps’ May 2022 Force Design 2030 Annual Update stated
The security environment is characterized by proliferation of sophisticated sensors and precision weapons coupled with growing strategic competition. Potential adversaries employ systems and tactics to hold the fleet and Joint Force at arm’s length, allowing them to employ a strategy that uses contested areas as a shield behind which they can apply a range of coercive measures against our allies and partners.
Operating in this environment, MLRs are intended to serve as what the Marines call a “Stand-In Force (SIF),” designed to help the fleet and joint force win the reconnaissance and counter reconnaissance battle within a contested area at the leading edge of a maritime defense-in-depth.
MLR Employment
According to a May 25, 2022, Marine Corps Association article “Missions, MAGTFs, Force Design & Change,” by Colonel Michael R. Kennedy, USMC (Retired), MLRs are intended to
Deploy to islands, coastlines, and observation posts along chokepoints where their networked sensors and weapons can surveil the air and surface (and, potentially subsurface) waterways. The MLR’s purpose will be to observe and prevent any “grey zone” activities that lead to fait accompli actions.
Download the document here.
