Concepts & Programs HomeProgramsFocus Area 3: Naval IntegrationMaritime Expeditionary Warfare

180329-N-NM806-0044 PHILIPPINE SEA (March 29, 2018) The amphibious assault ship USS Wasp (LHD 1) prepares to conduct a replenishment-at-sea (RAS) with the fleet replenishment oiler USNS Tippecanoe (T-AO 199). Wasp, part of the Wasp Expeditionary Strike Group, with embarked 31st Marine Expeditionary Unit, are operating in the Indo-Pacific region to enhance interoperability with partners, serve as a ready-response force for any type of contingency and advance the Up-Gunned ESG Concept. (U.S. Navy photo by Mass Communication Specialist 3rd Class King/Released)


The Marine Corps operates on and from the sea, in and from the air, and on the land. It is structured to operate across any domain. The Marine Corps is optimized to be expeditionary -- a strategically mobile force that is light enough to get to any crisis quickly and able to accomplish the mission or provide time and options prior to the arrival of additional forces.

To Marines, being expeditionary influences every aspect of how we organize, train, and equip the Marine Corps. It is more than the ability to deploy overseas when needed. It is an institutional imperative that acknowledges the necessity to deploy rapidly, arrive quickly, begin operating immediately, endure indefinitely, and win decisively.

This expeditionary ethos is the most critical contributor to the Corps’ success in crisis response and complex contingencies. This ethos has been deliberately cultivated and exploited by Marine leaders for generations. It is this mind-set that drives our capability development efforts and ultimately generates both combat power and the organizational flexibility to accomplish diverse missions across the range of military options (ROMO). Our amphibious heritage and expeditionary culture can be accurately summarized as fast, austere, and lethal.

As the Nation’s Expeditionary Force in Readiness, the Marine Corps’ primary contributions to the U.S. defense portfolio are “the ability to respond to crisis” and “assure littoral access.” Given this emphasis, our focus ranges from security cooperation to amphibious forcible entry with special emphasis on crisis response. Fulfilling this role requires a forward posture with the right mix of capabilities to deploy, employ, and sustain our forces in austere environments.

We are a Maritime Nation. Freedom of movement and freedom of access are key to our national security and economic stability. The littorals contain key global engagement points. The Navy-Marine Corps team is uniquely organized, trained, and equipped to assure access and influence in the littorals.

The American people and our leaders expect the Navy- Marine Corps team to project a credible force anywhere on the globe at the time and place of our choosing capable of imposing our will. We recognize our current strategy demands Trans-regional, Multi-domain, and Multi-functional forces (TMM).

The Marine Expeditionary Unit (MEU) is a TMM force and must be sized and resourced to conduct 13 specified MEU missions. The Marine Expeditionary Brigade (MEB) must be a JTF enabler, forward deployed, capable of rapid deployment/ employment to deter and defeat peer adversaries.




Naval Integration