What are the missions of the USMC?

• A. Aid the Navy in protecting naval facilities and other important military/political installations, and perform any other duties the President may elect.
• B. Patrol coastal waters and enforce maritime law worldwide.
• C. Conduct only domestic disaster relief missions within the United States.
• D. Lead all air combat operations in time of war.

Answer: (A)

The main idea being tested is how the Marine Corps functions as an expeditionary force that supports the Navy by securing naval bases and key installations, while remaining ready to take on missions assigned by civilian leadership. The best choice describes the Marines aiding the Navy in protecting naval facilities and other important military or political installations, and performing any other duties the President may elect. This captures the Marines’ role as a rapid, sea-based force that can project power, protect critical sites, and execute tasks directed by national leadership to meet strategic objectives. The other options describe roles more appropriate to the Coast Guard (patrolling/coastal law enforcement), domestic disaster relief as an exclusive mission, or the Air Force’s lead in air combat—none of which align with the Marine Corps’ broad, expeditionary mission.