What is the difference between a Geographic vs a Functional Combatant Commander?

• A. Geographic commanders oversee a specific function; Functional commanders oversee a geographic region.
• B. Geographic commanders cover all regions and functions; Functional commanders focus on a region.
• C. Geographic: responsible for a certain geographic region, spanning all services and functions; Functional: covers all regions and responsible for a specific function.
• D. Geographic commanders are joint force planners; Functional commanders are logistics chiefs.

Answer: (C)

The main idea is that geographic and functional commanders organize and exercise authority in different ways. A geographic combatant commander has responsibility for a defined geographic region and must integrate and command forces from all services within that area to conduct operations there. A functional combatant commander, on the other hand, is responsible for a specific capability across the entire globe, spanning all regions, and provides that capability to support operations wherever needed.

That means a geographic commander handles everything—air, land, sea, and other functions—within a particular part of the world. A functional commander focuses on one capability, such as cyber, space, transportation, or special operations, and delivers that capability across all regions, coordinating with multiple geographic commanders as needed.

So the correct statement reflects this distinction: the geographic role is region-based and covers all services and functions within that region, while the functional role is capability-based and global, spanning all regions. The other descriptions invert or misstate the scope of each command, or reduce their roles to something like planning or logistics, which doesn’t capture the full authority and scope of GCCs versus FCCs.