Which command is characterized by a broad continuing mission under a single commander?

The correct answer is Combatant Command (COCOM) because it refers to a command structure defined within the U.S. military where a unified or specified command has a broad, continuing mission under a single commander. This structure allows for the integration of resources and personnel from multiple services to effectively address ongoing operational requirements and strategic objectives.

COCOMs are established by the President or the Secretary of Defense and are responsible for a specific geographic area or functional mission. They operate with a permanent and overarching command authority, which distinguishes them from other command types that may be temporary, such as those designated for a specific task or operation.

In contrast, a Joint Task Force is typically more temporary and focuses on a specific mission or operation, which can change over time. A Unified Command, while similar to COCOM, might also suggest a coalition or joint command that isn't solely U.S.-centric and can coordinate with other nations' forces. Operational Command is a more generalized term and doesn’t encapsulate the enduring and broad responsibilities that define a Combatant Command.