Which of the following is NOT a type of naval expeditionary force?

The Civil Affairs Team (CAT) is indeed not classified as a type of naval expeditionary force. CATs focus primarily on civil-military operations to facilitate the restoration of civil governance and assist with humanitarian efforts during and after military operations. Their role is more about synchronizing and coordinating efforts between military and civilian populations rather than operating as a dedicated expeditionary force.

On the other hand, the Marine Expeditionary Brigade (MEB), Marine Corps Air Ground Task Force (MAGTF), and Marine Expeditionary Unit (MEU) are all specifically designed as part of the Marine Corps' structure for rapid deployment. These forces are organized to provide rapid response, combined arms, and a robust capability to project power from the sea, making them quintessential elements of naval expeditionary operations. The distinctions among these forces are primarily based on their size, capabilities, and specific mission focus within the broader context of naval warfare.