Final answer:
The Air National Guard or Air Force Reserve RED HORSE unit reports directly to the installation commander or a theater-level command upon mobilization, with their chain of command varying based on the assignment.
Step-by-step explanation:
When a Air National Guard or Air Force Reserve RED HORSE unit mobilizes, it typically reports directly to the installation commander of the base they are deployed to, or to a theater-level command, depending on the nature of the mission. RED HORSE units are specialized engineering and construction groups that provide rapid response capabilities for a variety of military construction needs, including airfield and infrastructure repair during wartime or in response to natural disasters. The specific chain of command can vary depending on the circumstances, but they generally operate under the Air Force Reserve Command or the Air National Guard command when not activated. Once activated, they could report through various levels of command depending on their assignment.