Defense Primer: Department of the Navy.

The article provides an overview of the U.S. Department of the Navy (DON), emphasizing its structure as a single military department comprising the Navy and Marine Corps, with shared leadership under the Secretary of the Navy, and explains budget allocations, personnel composition. Topics include the terminology used to encompass both the Navy and Marine Corps, budget distribution between the two services, personnel statistics, and the Coast Guard's status and coordination with the Navy.