Marine Corps Plans 6,500 New Positions by 2031

The Marine Corps confirmed a five-year growth plan that adds more than 6,500 billets across infantry battalions, drone units, air defenses, and new occupational specialties. The extra structure is meant to staff the systems the Corps has already bought and the units it is still building.

A Sept. 1 statement from Marine Corps Combat Development and Integration laid out the Force Structure Review in public for the first time. The service said it has an executable plan for 4 percent end-strength growth by 2031 and assessed another 1 percent the following year.

Those Marines will be spread across 64 initiatives. The announcement follows earlier reporting on a 4 to 5 percent growth target and turns that target into named billets, schoolhouses, and companies.

For Marines already in uniform, the plan is less about a bigger Corps on paper and more about who sits in which seat. Infantry battalions get more gunners and scouts. Each Marine Expeditionary Force (MEF) gets a robotics company. Installations get dedicated counter-drone structure. School of Infantry-West gets a second small-drone schoolhouse. Recruiters get more manpower to fill the extra contracts.

According to the Combat Development and Integration release, the growth is designed to produce four advantages: more combat power, especially in the Pacific and the First Island Chain; robotic and autonomous systems in units that can actually employ them; specialized Marines for all-domain effects; and bigger training pipelines.

By aligning trained Marines with modernized capabilities, the Marine Corps ensures prior and future investments in robotics, precision fires, counter-UAS, artificial intelligence, and autonomous systems produce warfighting advantages

That line is the core of the story. Force Design spent years buying and experimenting. The review now staffs those investments. The service spent four months earlier this year cutting a wish list of roughly 18,000 requested positions down to about 9,000, as Lieutenant General Eric Austin, commanding general of Marine Corps Combat Development Command and deputy commandant for Combat Development and Integration, described in June. The published plan represents the changes that made it through that cut.

Infantry Battalions Get Depth and a New Scout MOS

The largest visible change sits in the ground combat element. The review adds personnel to 19 infantry battalions and two littoral combat teams. Those Marines formalize crew-served weapons resiliency, stand up heavy guns platoons, and expand precision fires plus intelligence, surveillance, and reconnaissance (ISR).

The added personnel are consistent with work already underway inside the battalions. Infantry squads are back to 13 Marines. Organic precision fires such as the Bolt-M loitering munition are reaching squads this year. The extra billets put more Marines behind the guns, mortars, and sensors those formations now carry instead of stretching the same rifle companies thinner.

The review also establishes the 0315 Scout as a primary military occupational specialty (PMOS) for infantry and light armored reconnaissance battalions. The specialty is intended to standardize training and keep a scout capability on the books instead of treating it as an extra duty. Reporting on the MOS has described a 26-Marine scout platoon in each infantry battalion, plus scout teams in light armored reconnaissance units.

Lieutenant General Jay M. Bargeron, deputy commandant for Plans, Policies, and Operations, called the job “a critical step in the modernization of our infantry battalions” in a June statement on the MOS.

This professional, purpose-built force will provide commanders with the organic reconnaissance and surveillance capabilities essential for success on the future battlefield.

Robotics Companies, a West Coast Drone School, and Base Defenses

Each MEF will activate a Robotics and Autonomous Systems (RAS) company inside the Marine Expeditionary Force Information Group to meet sensing demands across the Marine Air-Ground Task Force (MAGTF). That is the operational counterpart to the training organization the Corps stood up this summer when Training and Education Command created the Marine Corps Robotics Integration Group at Twentynine Palms.

As for throughput, the review establishes a second Small Unmanned Aircraft System schoolhouse at School of Infantry-West at Camp Pendleton, California, to increase production of PMOS 7316 (sUAS Operator). A separate initiative builds a permanent small unmanned aircraft system and counter-small unmanned aircraft system training hub to standardize instruction across the Total Force.

Installations will also receive added positions. The Installation Counter-Small Unmanned Aircraft System initiative adds structure so bases can field a dedicated defense against adversary drones rather than borrowing operators from tenant units every time a threat appears over the fence line.

All three active duty Marine Logistics Groups will now add maritime distribution platoons and air unmanned systems sections. Marine Forces Reserve receives five related initiatives, including reserve infantry modernization, a 6th Air Naval Gunfire Liaison Company detachment, and Marine Aircraft Group 46 activation.

New Career Fields and Who Has to Fill Them

The review turns digital operations identifier 0673 into a primary MOS covering software engineering, data science, and artificial intelligence. Intelligence structure expands across multiple disciplines.

Marine Medium Tiltrotor squadrons pick up more maintainers across 16 active and two reserve VMM squadrons. Air defense radar and command-and-control units in the Marine Air Control Group add billets tied to medium-range air defense radar.

Marine Corps Recruiting Command is reinforced so the accession apparatus can keep pace with the extra end strength. That is the unglamorous half of any growth plan. New schoolhouses and companies do not fill themselves.

The extra recruiter and support structure is how the Corps intends to turn authorized billets into trained Marines without hollowing the operating forces to feed the school pipeline.

Pacific-focused structure will run through several lines at once: more capacity for U.S. Pacific Command and U.S. Pacific Fleet requirements, added logistics depth in III MEF, installation resiliency in the Pacific, and stand-in force command and control so III MEF can fight from local bases.

Those changes sit on top of the Force Design adjustments already in place for Marine Littoral Regiments and a reinforced 4th Marine Regiment in III MEF.

What This Means for Marines Now

None of the 6,500 billets appear overnight. Tables of organization published in late August already began folding 2026 Force Structure Review Group decisions into the Fiscal Year 2027 through 2047 Authorized Strength Report, according to MARADMIN 387/26. Units will see the changes first as new line numbers on a Table of Organization, then as school seats, then as Marines on deck.

In practical terms, infantry Marines should expect more specialized seats inside the battalion: heavy guns, scouts, precision fires, and ISR. Marines looking at a lateral move have new primary fields in 0315 and 0673, plus more 7316 throughput on the West Coast. Maintainers, air defenders, intelligence specialists, and logisticians tied to unmanned distribution pick up structure as well.

Promotion and assignment math will follow the inventory. More billets in a MOS can ease cutting scores over time if accessions and retention keep up. They can also create short-term strain if schoolhouses and monitors cannot fill the new structure as fast as the tables change. The review itself flags recruiting reinforcement for that reason.

The Corps described the plan as fiscally responsible and adaptable. Congress still has to resource the end-strength path year by year. What is no longer theoretical is the destination: more Marines in the formations that carry the drones, guns, and sensors Force Design already fielded, rather than leaving those systems under-crewed.