The Marine Corps provides fleet marine forces for the seizure or defense of ________ and for the conduct of such ________ operations as may be essential to the prosecution of a naval campaign.

• A. advanced naval bases
• B. forward operating bases
• C. airfields
• D. strategic ports

Answer: (A)

The task highlights the Marine Corps’ role in seizing or defending bases that extend the Navy’s reach and in conducting operations essential to support a naval campaign. Those forward hubs, called advanced naval bases, are the strategic targets the FMF is trained to secure or protect so ships can operate, resupply, and project power at distance from the fleet. This wording emphasizes establishing a base of operations that enables sustained naval action, rather than focusing on a single facility like an airfield or a port. While forward operating bases, airfields, or ports may be involved in the broader context, the term that best fits the described mission is advanced naval bases.