What is one mission of the Marine Corps?

The mission of the Marine Corps primarily includes performing duties as directed by the President of the United States. This reflects the unique role the Marine Corps plays within the U.S. military framework, acting as a rapid-response force capable of responding to emergencies and conflicts globally. The Marine Corps is often the first U.S. military presence in times of crisis, executing various operations ranging from combat missions to humanitarian assistance. This mission ties directly to the Marine Corps' readiness and flexibility, enabling them to undertake a wide range of tasks that align with national security objectives.

The other options focus on responsibilities that are not traditionally associated with the Marine Corps, such as maintaining naval ships, commanding the Army, or managing Navy bases, which fall under the purview of the U.S. Navy and other military branches.