What rank is typically the senior officer commanding a Marine Expeditionary Unit?

The rank typically held by the senior officer commanding a Marine Expeditionary Unit (MEU) is Colonel. A Marine Expeditionary Unit is a balanced, combined-arms task organization that includes ground, air, and logistics components. The commander of a MEU is responsible for leading and coordinating these varied forces in operations, which may include amphibious assaults, humanitarian assistance, and crisis response.

A Colonel is the appropriate rank for this position because it reflects the level of responsibility and experience required to command a unit that is capable of rapid deployment and operations in various environments. The colonel oversees the extensive planning, operational execution, and management of resources needed for the MEU's diverse mission set.

While other ranks like General and Admiral are higher in the hierarchy, they typically command larger formations, such as divisions or fleets, rather than a specific unit like a MEU. A Lieutenant Colonel could be a commander of a subordinate unit within the MEU, but the overall command is vested in a Colonel. Thus, the rank of Colonel accurately reflects both the leadership and operational responsibilities within the structure of a Marine Expeditionary Unit.