The Navy Expeditionary Combat Command (NECC) is an echelon III command of the United States Navy, which serves as the single functional command to centrally manage current and future readiness, resources, manning, training and equipping of the United States Navy's 21,000 expeditionary forces who are currently serving in every theater of operation.

NECC seamlessly operates with the other services and coalition partners to provide cooperative assistance as requested.

Members of most NECC Commands are generally expected to seek qualification for the Enlisted Expeditionary Warfare Specialist Insignia.

It will share battle space with the other Services in an effort to close the seams in Doctrine, Tactics, Techniques, and Procedures, and Command, Control, Communications, Computers, Intelligence, Surveillance and Reconnaissance.

Amphibious Warfare: transporting, ship-to-shore and across the beach, personnel, weapons, equipment, and cargo of the assault elements of the Marine Air-Ground Task Force.