USMC Unit Page

Mission

The United States Marine Corps serves as an expeditionary force-in-readiness. As outlined in 10 U.S.C. § 5063 and as originally introduced under the National Security Act of 1947, it has three primary areas of responsibility:

The seizure or defense of advanced naval bases and other land operations to support naval campaigns;
The development of tactics, technique, and equipment used by amphibious landing forces; and
Such other duties as the President may direct.