The Marine Corps' role also includes the conduct of such ________ operations as may be essential to the prosecution of a naval campaign.

• A. air
• B. land
• C. sea
• D. space

Answer: (B)

The Marine Corps functions as the naval service’s expeditionary land combat force, providing the ground power that enables a naval campaign to succeed. In a naval campaign, gaining and holding land areas such as beaches, ports, and airfields is often essential to project and sustain sea power. The Marines conduct those land operations to establish lodgments, secure critical terrain, and enable follow-on naval and joint operations. While air and sea operations are important, their primary roles are handled by other forces, and space operations fall outside the Marines’ traditional scope. Therefore, land operations best fit the described role.